[dale_glass]

I'm generally friends with good, sane, smart people. If they're all jumping from the bridge, there's almost certainly something to jump from, so yes I would.

https://xkcd.com/1170/

[bigstrat2003]

If your friends all start to jump off a bridge, the rational thing to do is question their sanity, not to just jump. That xkcd is dead wrong.

[gitaarik]

Or you should wonder why they might jump instead of directly questioning their sanity. Then if you see the bridge is on fire and it's safe to jump into the water, then it makes sense, right?