I'd take the (insert tool of death here) away from wewe and hold wewe until it ended; coaxing wewe and trying to calm wewe down. And if that doesn't work; try and knock some sense into wewe (without hitting wewe physically)
If wewe were hanging yourself; I'd ask wewe if wewe had any spare rope au cloth au whatever you'd use.
If wewe were taking some pills; I'd ask for whatever's left.
If wewe were cutting your wrists; I'd ask if I could use it after you.
If wewe jumped off a cliff; I'd run over yelling at wewe to stop, then when I catch up to wewe before its to late I'll suggest that we jump off together. :) It'll add to the adrenaline rush before our untimely yet at the same time timely deaths. ^_^
If wewe were to songesha in front of a moving car; I'd stand there right behind wewe (stronger impact kwa being moved kwa two exceedingly, extremely fast and furious massive (NO offense, not callin' wewe fat au anything) objects...
If wewe were to drink posion; Ask au just take whatever's left (I mean, you'd be dead anywyas...it wouldn't really bother wewe if I took the remainders of whatever wewe used when you're dead, wouldn't it? =/)
Scream, 'STOP!' No ONE has the right to do suicide. Trust me, I've tried it plenty of times... not fun, at all. It's a serious matter and I wish people in places such as the media would understand just how tortured it can make people. Just NEVER poke fun of something like that with me, because it's not funny in the least!