I feel bad for all of you that don't get to experience the full on brownie effect!!! wow. Anyway. I have had a couple experiences where nothing happened also. I believe there are several reasons for this. 1. Your stomach should be empty for full effect. 2. A slightly tilted tray can cause oil to seep from one side to another. 3. You didn't let the bud simmer for to long or not long enough. I am curious if there is a scienetific reason why it doesn't work for people.