I've had a fat line of some white crystals and smoked weed and enjoyed it. I was told it was mephedrone but we acquired it as molly.
Generally stimulants never mix well with THC due to the tendency to escalate one's heart-rate to unsettling speeds. This usually causes panic in the user.
For me, I leave the weed for when I'm coming down with a benzo but some can tolerate the mix. Only you would be able to know.
Anyone tried this combo? if so what like?