the only time I've had too much was when I smoked a strain called "fire" (dont know if it's just local or something) but it was so sticky if you threw it against a wall it would proably stick. I took one hit and I was already feeling it real good, when I took my second hit I was holding it in and i was so high I forgot I inhaled so I started breathing normally and then I started choking on the smoke (sort of like when you take a drink of water and it goes down the wrong pipe) and I was close to puking, and after coughing for 10 minutes straight everything looked almost "2-D" lol