Bob Odenkirk worked surprisingly well as an action guy
I didn't expect that to be the case. I figured they'd have to use all kinds of quick cuts and creative editing to make it work, and that he just wouldn't have the right aura surrounding him, but he was surprisingly convincing and moved well in the action scenes. Never in my life would I have thought to cast Bob Odenkirk in a role like this, but it was an inspired choice.
P.S. I never knew that Christopher Lloyd wielding a shotgun was something I needed in my life, but it was.