Originally posted by Swanky-Tuna
A friend of mine and I worked it out. Mindless Hulk did nothing to Onslaught. He only hit him hard enough to open a pocket dimension where Batman lives just long enough for him to kick Onslaught once.The very same kick that knocked the wind out of Hulk in the crossover.
Onslaught also opened that pocket dimension to use a kick to put the gem into Juggernaut, when nobody was looking, and then pull it back out with another kick.
Edit: wrong quote
I KNEW IT!!