tilt explained (by neuroscience)

[llleisure]

You could have heart-rate induced tilt according to Blink by Malcom Gladwell (also a pretty good book.)

I can't recall exactly what he says but there is something like an ideal elevated heart rate where your brain is getting the right amount of blood to make good decisions. Then there is a rate above that where your body starts sending a bunch of blood to your legs for you to run away and such and your brain gets less at that point and it can badly affect your judgement.