The death of Strickler in the season 3 mid-season finale. "Fiona is not my past." BANGBANG

The entire episode where Michael and Bly are hostages in the bank robbery.

Michael

Starting off with the incredibly obvious: Michael jumping out of the helicopter at the end of "Lesser Evil."

Maddy's interrogation of a prisoner.

Michael, on a motorcycle, sliding under a eighteen wheeler truck without injuring himself and leaving the motorcycle totally intact.

Michael Weston doing his best impression of a Magnificent Bastard in the episode, "Friendly Fire". Here is just one example from the episode

Michael: "I'm here for the van."

Gangsta: "What van?" (Michael snaps his fingers and the hinges of a nearby garage door blow up and the door collapses and exposes the van, all in slow motion)

Michael: "That van. (Gangsta takes one look at the van, then back to Michael, and then just runs away.)

Sam Axe, as played by the incredible Bruce Campbell. I defy anyone to find an episode that DIDN'T contain a CMOA.

The season 2 episode "Hot Spot" had so many crowning moments of awesome: -Michael, Sam, and Fiona pulling up next to the car thieves at a stop light. Mike tosses a can of tear gas into the car, Sam shoots the tires out with shotguns, and Fiona lights a can of thermite on the car hood, destroying the engine. -Michael, Sam, and Fiona breaking into the car thieves lair. Blowing the backdoor off its hinges, keeping the car thieves at gunpoint, and then lighting bar on fire while casually noting "Your place is on fire"? Fantastic.