I just had that happen the other day. A friend of a friend called me up because he's trying to stat dealing and wanted me to try his shit. I get over to his place with my buddy and we sit down and he pulls out a big bag of shitty looking weed and says " you guys gotta try this shit! It's supposed to be fucking BOMB!" Well lets just say it was far from that. 6 bowls between the 3 of us later I was starting to feel a buzz. I couldn't help but laugh. We didn't even need to tell him he needed a new hook up.