Well based on my conception of "Trippy" the most important thing you need to consider is if you want the person who watched to feel like they had a good trip (happy), a bad trip (disturbed), or a WTF trip (WTF), because those are 3 very different things. For any of them you should have no idea why it made you feel that why but it should make you feel that way. So first off
Humans love repetition it is just how we work so the use of lack of use is really important. A good trip will use it a lot, a bad trip will work hard to not use it, and WTF is yeah ...
Happy will want to use lots of bright colors, smooth transitions, and constant slow movement. The repetition is most important to make it feel predictable like there is going to be more of the same good things ahead.
Disturbed will want to use pretty much the exact opposite, darker colors, rapid transitions, chaotic movement from slow to very fast to frozen. Make the entire thing unpredictable, change at what seems like random times and take everything you know about syncing and do it slightly wrong (its amazing how much that can effect people).
WTF is hardest to explain due to the fact that by design you should have no idea what happened. I would say the best way to do that is to mix/switch between the other two and see what happens.
This is of course all psychological stuff and ever person is different so this is just my take on it.
Zanz Bonus Points Tally
8bit_samurai: 1, CodeZTM: 1, Eake4: 2, ibabrak: 5, Mirkosp: 4, tipsd9video: 1, uncreative: 1