"Another World, Another Foe!" - Ignoring the Leader's band of humanoids who attack him with strange staggering stun rays, the Incredible Hulk -- strongest living mortal to stride the Earth -- hardly feels their attack as he uses all his tremendous willpower to stop himself from changing back to Bruce Banner! For, minus the Hulk's strength, the bullet in Banner's brain will instantly destroy him!
"By Force of Arms!" - a Sub-Mariner story