The first death in Dragon Ball. Effective as hell when they found him, less effective when they showed the fight.
I'm including that time Frieza impaled him with the horn because goddamn. And he pretty much would've died if Dende didn't heal him. I'm counting it.
Frieza blowing him up and sending Goku into a rage that made him become a Super Saiyan.
Future Krillin Dying to the Androids
Super Buu turning everyone at the lookout into candy and eating them. Krillin tried to be a distraction, but that didn't last long.
Whatever it was that happened with Super 17 in GT.
I'm including that time Frieza impaled him with the horn because goddamn. And he pretty much would've died if Dende didn't heal him. I'm counting it.
Frieza blowing him up and sending Goku into a rage that made him become a Super Saiyan.
Future Krillin Dying to the Androids
Super Buu turning everyone at the lookout into candy and eating them. Krillin tried to be a distraction, but that didn't last long.
Whatever it was that happened with Super 17 in GT.