Heres a list of the top 10 movies I've seen while messed up one one substance or another......
10. ItBy itself I think this is one of the longest most boring movies I have ever seen, but under the influence WOW thats one entertaining clown! I have never enjoyed IT in a serious condition but if you keep the drinks pouring it makes one good movie.
9. Galaxy QuestIts really hard to explain why I felt the need to include Galaxy Quest in this list but it really is extremely funny when your drunk. I cant even properly explain myself.... trust me.....just look Alan Rickman......
8. Eight Legged FreaksGigantic spiders killing stupid people in a random gold mining town in the middle of nowhere is a drunkards dream movie. From the spiders sounding kind of like some kind of monkey to just the purely ridiculous plot this is a really fun movie to watch when your messed up with friends and best of all it encourages you to keep drinking.
7. Plan 9 From Outer SpaceOne of the worst movies ever made happens to also be one of the best to see when you've been having a fun night. For me and my friends Plan 9 becomes absolutely amazing in the right condition. Are we just stupid? or is it really truly amazing when you can stare blankly at the screen and not get bored but laugh!!!...... see for yourself!
6. JackassWatch with caution. Under the influence jackass is even better than when sober but you likely will get the irresistible urge to copy whatever they do. This often is a cause of pain and amazing stories to tell people later after you have recovered. Watch at your own risk.
5. Kung Pow!Kung Pow is a must see. Steve Odekirk makes old kung fu movies funny. Although a good movie to see sober for some people i've forced to watch it, they've found it just too stupid. If your one of those people who cant enjoy great stupidity then the best way to watch is to become stupid yourself!
4. My Cousin VinnyJoe Pesci as a lawyer in a small Alabama town is really all I need to say to get most people to see this movie. Drunk or sober im pretty sure you'll laugh its a good one to watch either way.
3. Animal HouseEveryone should have already seen this movie and chances are if you saw it in college then you were already drunk so your way ahead of me. If you haven't seen Animal House then get you uncultured ass out to a video rental place or go online and watch it.
2. Bill and Ted's Excellent AdventureTwo dumb as hell teens in a time machine to pass a report about historical figures.....that should explain it all.
1. Fear and Loathing in Las VegasThis was probably expected but it must be my #1. Fear and Loathing is for me the best movie to watch when your drunk or messed up in anyway. You can slightly relate to Johnny and Benicio's characters when messed up, but only if you were doing a lot of different things..... anyway everyone should see this movie.

So there it is my list of movies to see when your drunk or whatever you happen to be.
Feel free to post more movies to the list im sure there are a lot of good ones I missed or haven't seen yet.