Volt Opt from PSO.
"Ball, ball, ball!!" quickly followed by "HELP ME!!"
Yeah, always seem that somebody would end up getting struck by it, winding up trapped as Volt Opt charged their plasma cannon. The ball would throw barriers up around whoever it hit, rendering them unable to flee, it was, however, possible to break the barriers down and free them before Volt Opt fired.
...You know your teammates hated you when you got stuck and they didn't come to your rescue.
Worst of them all though is Dark Falz's move when he found a "host"...though to be truthful, it's strength was proportional to the stupidity of your allies. When Falz found a host, they became linked...so when he took damage, so did you.
No excuses for it, though, we could all see each others health meters, and then they'd ***** at you for dying, which was their fault to begin with.