Why Roller Coasters Make You Vomit and Scream

Ever wonder why roller coasters can make even the strongest of stomachs feel like they're turning inside out? Or why, as you seemingly dangle dangerously upside down, you never quite feel like you're actually upside down? And did you know that some of the force you feel along the way has the potential to "cause brains to bleed and eyeballs to explode?"

Well, lucky for you, The Washington Post has come up with this wonderful, interactive animation that explains how roller coaster designers play with G-force and physics to give you that safe, contained feeling of absolute terror. Faint of heart are more than welcome. [The Washington Post via Digg]