Speaking of strange senses:
1. Does anybody else see green/yellow cat eyes when they close their eyes really hard?
2. Does anybody else see purple/blue waves when they close their eyes really hard?
3. Can anybody else smell rain, or snow right before it happens?
4. When laying down on a trampoline, does anyone else see a bunch of really small atom-like objects moving rapidly around?
5. When laying your head against a pillow late at night, does anybody else hear "extra" noises?
These are just some random things that have bugged me over the years...
1. and 2.; As have already been said, try pushing against your eyes with your hands and you'll start to see the real trippy stuff. And then when you open your eyes again they'll be in "high-contrast-in-photoshop"-mode :] All reds and yellows and blacks and white, then it'll slowly revert.
Trippy.
3. Unfortunately. But I do love the smell om rain on warm days.
4. Ah, I love my floaties. :]
5. I have heard an orchestral track that emanated from my own head, I loved it. I have also started to hear extra tracks on records that have stopped playing when trying to sleep. For some reason, turning off the stereo always works o __o;;