I've smoked shrooms in a bifta before - we'd been out picking and only managed to get about 40 between us - so we dried them out a bit and powdered them.
Smoking it definitely has an effect - sort of like smoking pot but more mellow and less of a head fuck.
Definitely won't make you trip though.
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Everybody asks yer name
they say you're all the same
so now it's nice one, Geezer
and that's as far as the conversation went