During the final battle Wolverine winds up battling a mutant capable of regrowing his limbs seconds after Wolverine chops them off, every time, without fail. Wolverine beats the mutant by kicking him in the nuts with all of his strength and, while walking away, tells him to try growing those back.
For some, watching Wolverine never learn what happens when he (a man with a metallic skeleton) tries to attack Magneto (a man with total control over magnetism). Epic Fail doesn't even begin to describe it, even if it's part of the plan.
Watching Quill, a guy whose power is having spines that at their longest are maybe 2 inches long pop out of his skin and only onscreen kill is by poping his quills while hugging a female scientist worried about her boss, try to act like he's a badass with the powers of a God is hilarious. Particularly when he tries it with Magneto, who is at best mildly annoyed by him.
The X-Men suit up for war, but Hank seems to have put on a few pounds over the years.