Make him happy before he smokes the weed! Even if the thought of getting a bad high before toking up isnt good. Try playing songs that will make him laugh and relax him. Bad highs can be saved although there are some that nothing will make them better.

Only bad high Ive ever had is when my girlfriend got really drunk and this guy was all over her. We had only started going out that week aswell. I must have smoked 5 or 6 bongs and a few joints but I felt nothing just depression. Whats worse was my girlfriend got really depressed to and just ran away from us, she got taken home by the police. Its all good now though, I couldnt be happier.