Meh, 'rx' is a term common enough in both countries is it not? I use it.
As for me in my younger days...oh boy..you don't know the half of it. Neither did my folks. Cooking GHB in the middle of the night, and slowly evaporating off the H2O in the oven with the concentrated NaGHB on Al foil lined baking trays, about 2.5 liters worth of GBL at a time, experimenting with THAT synthesis using red phosphorus and iodine, after reading about methamphetamine in a library book on org. chem...big bergens full of scrap lead and copper (which I always stuffed full of soil and rocks to make it weigh more, a bit naughty of me, but my excuse is that I was only 7 or so and I didn't get much other money, I had to stock my lab somehow did I not?

)
Electrolysis gone wrong (that vase), I'd done a quick and dirty, inexperienced hack on a plug, replaced the fuse with a cast slug of metal so it wouldn't trip, connected up to a pair of carbon electrodes cut out of batteries, drilled two holes, one in either side of mom's vase, epoxied them in place and then filled it with molten caustic, using a broom handle to push the electric 'on' switch. Should have heard the sodding great CRACK!! sound that followed immediately after. That was vase no. II if I recall correctly, the first having been sacrificed to an attempt at doing it in aqueous solution. Oops.
And of course, it blew a volcanic plume of molten caustic soda near enough onto my bedroom ceiling.
Lets see..what else....thermite reactions lit on the garden path, my folks wondering, most likely, why I was walking out there wearing a pair of welding goggles and carrying a blowtorch.
A garage filled with chloroacetone (tear-gas), and me diving for cover and doing a commando roll under the gap of the door, after it turned a sort of pallid, bleached, chlorine-esque shade of green, then immediately afterwards, flash-boiled in an exothermic runaway, vaporizing the entire batch into the air, sending me diving for cover, whilst an eye-watering, lung-searing virulent cloud of noxious fumes and chlorine gas began belching out of the garage.
White phosphorus burn once, that left me with one arm and hand near enough paralyzed, leaving me having to go to school and try fobbing the teachers off with an excuse as to why I was using only my non-dominant hand for the best (worst) part of a month to a month and a half, because I couldn't even hold or pick up a pencil without it falling out of my hand.
Distilling chromyl chloride (a violently water-sensitive, carcinogenic, toxic, fuming volatile oxidizer from hell with a nasty tendency towards setting things on fire on contact, made by heating a mixture of a dichromate salt, concentrated sulfuric acid (98%) and table salt to about 120 degrees 'C and distilling the result, condensing the orangey-brown bromine-looking vapors to condense it to a volatile, foul smelling liquid with the appearance of bromine) and a flask failure, cracked right round the middle causing the bottom to drop out, only just managed to jump to the side and avoid being doused from the waist down, and the part that hit the bench-top, literally burnt it to ashes at a touch of the searing blazing hot mixture of boiling chromyl chloride, concentrated sulfuric acid and potassium dichromate. Had to carve out the section of my lab bench that was touched by it and dispose of the hexavalent chromium impregnated, acid saturated, poison-fuming carbon foam left in its wake of destruction. as hazmat waste and patch in a fresh piece of unburnt wood, since what was left was just charcoal, albeit charcoal saturated in corrosive, fuming, virulently acidic kidney and bladder cancer.
Perchloric acid burn on my hand, and a burn from thionyl chloride, the SOCl2 burnt straight through my leather gloves, rusting the steel spikes on them in moments, and when I tried taking the remnants of the gloves off, it just tore off what was left of the skin from 3/4 of my hand, which had been burnt down to the muscle, which was left smoking and saturated in acid, giving off choking fumes and hurting like all fuck. Still got the scars from that one.
flashpowder burn to the eye once, although thankfully not too severe, compared to what could have happened (I.e taking my head off its shoulders)
And once, managed to accidentally wash a small (i was young and had to teach myself, didn't know better at the time) amount of acrolein down the sink, only to chase it with HOT water, vaporising a filthy, burnt grease-stinking, rancid cloud of virulent choking lachrymatory fumes back up the pipes and into the kitchen.
Successful electrolysis, argon inert gas tank ran dry, causing sodium to form at an alarming rate, in little to medium sized blobs, at several hundred degrees 'C, which immediately exploded, sounding like machinegun-fire, interspersed with the odd and not particularly infrequent large blast, as if the machinegun were accompanied by artillery shelling.
And of course, plenty high-jinx of the kind kids just love, involving shoulder-launched rockets, grenade launchers, black powder, flashpowder, some improvised plasticized incendiary composition of mine based on chlorates and perchlorates, TNT and plenty others beside. That incendiary mixture most often finding itself strapped to a propane tank, with a fuse stuck in one end, accompanied by a pre-teen boy running like hell until far enough away to turn and watch as the propane cylinder would burn through and the gas would burst out and explode, firing the gas bottle up like a missile into the air.
The garage at the time, had a pretty much permanent odor of chlorine gas, solvents, the tang of sulfur dioxide and HCl gas hanging around too. Was a bit of a bugger at that age.
And lets just say, I've learned never to fire a rocket propelled grenade down a sewer with only one open end. The shockwave sent me reeling, my ears ringing and seeing nothing but white.