As you nearly reached the top of Hrimthur's Wall - the wall between Midgard and Asgard - Heimdall appeared and crouched, suddenly grabbing your forearm. He didn't pull you up, though.

"Hello," he greeted with a smirk. There was an apple in his other hand.

"So, what part of the enormous wall made you think, "Oh, visitors must be welcome?"

You somehow managed to stumble, though Heimdall's firm grip kept you in place. Still, you were basically at his mercy, dangling from the edge.