I have never ever smoked marijuana, but I loved Harold and Kumar Go to White Castle. That is a seriously hilarious movie and I really enjoy the buddy vibe between the friend who is concerned about consequences and the friend who just wants adventure. I have those two friends debating in my head all the time.
If you must smoke pot while you watch Harold and Kumar, I recommend renting Harold and Kumar Go to White Castle now. If you do not require the sweet herb for your movie experience, then you will be pleased to know that the sequel, Harold and Kumar Escape from Guantanamo Bay, opened this weekend.