This is hardly something you recommend to anybody. If it works for you great, but for most people it could even be dangerous:
1. Marijuana promotes appetite (munchees is the name). Canabinoid receptor antagonist promotes anorexy. This might depend greatly on the marijuana strain (CBD vs THC vs ...)
2. Your state of the mind is different, you might even got hit by the car.
If you talk about doing it after exercise, then its a different thing.