• Drinking coffee
• Drinking soda
• Blowing your nose
• Straining on the toilet
• Being startled
• Getting angry
• Having sex
• Exercising

The rupture of a brain aneurysm is a relatively rare event but, as it causes bleeding in the brain, that event is a potentially devastating one. Now researchers have attempted to identify possible triggers for such ruptures, also known as hemorrhagic strokes, finding that sex, coffee and losing one’s temper -- among other things -- may raise the risk.

Such ruptures begin with aneurysms, which are weak spots in blood vessels in the brain. Under stress, those weak spots can rupture and lead to hemorrhaging, or bleeding. But it wasn’t clear what activities put people at the most risk of a resulting hemorrhagic stroke.

“Reducing caffeine consumption or treating constipated patients with unruptured [intracranial aneurysms] with laxatives may lower the risk of [subarachnoid hemorrhage]. Although physical exercise has a triggering potential, we do not advise refraining from physical exercise because it is also an important factor in lowering the risk of other cardiovascular diseases.”

This is the artwork I got when I image-googled  "angry sex with my running partner in a café restroom."

... and this. I'm guessing that bloke on the bottom is at minimal risk for a brain hemorrhage.