#1. Make sure you are smoking from a bong. Most other methods are prone to mess-up if you don't have experience.

#2. Make sure he is doing it correctly, take a medium sized hit and make sure he holds it deep for 8 seconds.


Follow these 2 guidelines and smoke 2 bowls, and then see if he doesn't think he is high.

95% of the time, it works every time :thumbsup:.