trigger

Brain bleed: 8 things that trigger ruptured aneurysms People sometimes joke about being so stressed out that they're about to burst an aneurysm. Unfortunately, for the estimated six million Americans whose brains harbor an aneurysm - a dangerously weakened portion of a blood vessel - that's...

http://www.youtube.com/watch#!v=5X5A2NTyBjQ&feature=fvw