I've never had red bull. Never had the inclination to ever buy or drink it.
Back when I worked for Kmart, we got one of those kinds of high-energy drinks for free when the store started carrying them. I didn't drink mine and didn't drink mine until one day I came in dragging not only my keister but a good part of my spine and limbs behind me. Decided to give it a go. Got it chilled (can't stand drinking lukewarm anything) and took a hit--
--and promptly upchucked in my wastebin. It was the most vile thing ever to hit my mouth, and that includes some of the things from the farm when I was little.
It amazes me that people not only drink that stuff but seem to LIKE it. But, then, I don't understand a lot of things people like to consume, so I should just add that to the list, eh?