Jeremy seems to consider Mark getting a Crowning Moment of Awesome in the first episode of series 5, when Mark prevents him from getting out of the flat by tackling him on the floor.
Jeremy: My God, you are! You are fighting me! This is incredible! [while Mark rather gently lowers him on the floor] You're putting your foot behind me, and you're pushing me down towards the floor! [as Mark sits on him] Finally, you're restraining me!
Mark: Okay. All right. I'm not gonna hurt you, I'm just gonna keep you here until the police arrive, okay?
Jeremy: This is - why hasn't this happened before?!