You can smoke mushrooms. I have done it two three times. It takes a carefull drying process and a mix with other psychoactive herbs.

Read Castaneda's lessons of Don Juan if you don't believe me.

But, talking about your regular mushroom that you all have probably, it's a waste to smoke it if you don't know how. So, unless you're an experienced psychonaut, don't.

Oh and your mate was probably talking out of a dark orifice of his