Escape from a straight-jacket? Probably quite a few people. McClane wouldn't get himself in a situation where he's captured and then jacketed up to begin with, he just kills and blows shit it, this is his MO. So that's a moot point.
Murtaugh does help him often, since the movies are 'buddy-cop' based. Chocolate-wonder throws him a police baton in the rain fight. Just like Murtaugh threw him the gun with the armor piercing rounds, wash and repeat, this is the buddy-cop theme.
Never said Riggs was a "total pussy", just effectively debated that he couldn't take out McClane in that thread long ago. Which you're still suffering colonic ailments over.