I've been doing nos for few years but recently I've been having what I think are seizures when I take a really large hit of it. Have I messed up my brain or something?
Whats happening is you are depriving your brain to long of oxygen. Go a little softer on the hits, and don't be scared to take a few breaths through the process. If you pass out, Its more than likely you will wake up seizing as well. This has happened to me as well. but I was abusing it. Simple changes to you use and you should be able to get a good nos buzz without any seizing.
this happend to my mate the other day hes a fkn retard i always tell him to take a few lungfuls of air in between chargers but he never listiens so yer he did 1 charger then another without air then another then another then another and his lips turned blue n he started leaning foward i just thought he was trippin til i stood up n tryed to talk to him he started breathing really funny kinda like he was snoring haha n he started to lean foward so i grabed his head if i dident he would have smashed it on the coffie table i pulled his head up n then e started convulsing bout 20 secs after the last hit he was aight.very scary for me though n the dickhead still wont listin to me he still dosent breath inbetween nangs