The Price of Freedom has Maniac get into a argument with resident marine Bad Ass Dekker. As they are about to come to blows Blair is presented with a choice: "Maniac's gonna get creamed," which will lead to him intervening, or "This I gotta see," which has him lean back with a smirk as Maniac gets...well decked.
If you take a certain path in the game Blair will find Panther inspecting a gun, bringing up Maniac not being able to take no for an answer. Blair can either promise to talk to him, or laugh it off. Either way during a later serious incident Blair addresses this.
"And while we're at it, Panther's going to do some surgery below the belt unless you learn to keep your hormones to yourself."
One scene has Maniac (yes, who else?) making small talk with Intrepid's helmswoman. Maniac ends up bumping into the ship's control panel, sending the entire carrier lurching sideways. The scene is capped off by Maniac attempting to play it cool while the helmswoman is visibly trying not to laugh.
Maniac is at again in Prophecy!
A few missions in, Maniac is finally given command of a wing, much to his surprise/delight. Hawke feels the need to toy with his awestruck state.
Maniac: I've always wanted this.
Hawke: To be a leader?
Hawke: To be in command?
Hawke: To be the one they string up when your wing screws the pooch on a mission?