The weed wasn't laced. 1.5 to 4 people is laughable for a veteran, but for someone just starting out, thats more than enough to get you toasted, especially off something like parachutes. The experience "coming back" is just your memory. Ever had any kind of tramatic incident. If you put your mind back into it, you will feel just as bad as you had when it was just occuring. Smoke weed, its not going to hurt you, just do it in a CALM, SAFE, RELAXING enviroment.