Hank had been minding his own business, walking back to his office form lunch when he'd heard screaming. A lot of screaming.
The young Doctor, despite still being with the fresh marks from the last attempt at heroism, immediately dropped his clipboard and hurried to see what was going on. What he found, startlingly enough, was a giant wolf in the middle of the hospital, running and turning and looking quite lost and hostile, people running in all directions to get away from it.
"Stars and garters!" Hank gasped. He'd never seen a wild animal, let alone one so close and angry. He thought quickly, then grabbed a bed sheet, maneuvering to be behind the beast. He could heal quickly, and had strength disproportionate to the average human beings. Two things nobody else in this hospital (at least that he knew of) could claim. That meant it was up to him to do something about the beast before anybody got hurt. Hopefully.
When he thought he saw his moment he lunged, enveloping the creature and wrapping both his arms and legs around it, his quickest motion to try and grab the beast's muzzle. He may have had advantages over the other human beings, but he was still very worried about being bitten himself.
"Calm down," he grunted, trying his best to speak soothingly even as he struggled for a grip. Maybe that was at odds with tackling a powerful critter, but he didn't want to anger the thing and more than he had to. "Be still, boy, we don't want you here any more than you want to be trapped."