Back in the day when I didn't know good weed from bad, I got a bag and the weed was like dirt brown and smelled like old woman perfume, I smoked a bit of a joint and nearly passed the fuck out, got all dizzy and my heart developed an irregular beat, as if it was about to stop. it was horrible and really put me off weed for a while, I reckon it was sprayed with fucking raid or something, sprayed stuff is common around here, specially with glass and stuff like that to make it look frosty and weight it. I know a few people that actually spray weed as a job, which is horrid.