The full version of the flashback of Wolf attacking a mobster hangout, reveals that he was actually on a Roaring Rampage of Revenge, because their boss tortured his mentor to death and Wolff was understandably pissed enough to go One-Man Army on them.
Wolff taking out two Mooks who were holding hostage a couple of farmers Christian helped out earlier.
One of Braxton's men actually puts up a decent fight against Wolff and leaves the latter winded for a moment. Wolff was also unable to beat him in hand-to-hand combat and was forced to grab the mook's flash grenade, stuff it under the mook's vest and restrain him long enough for it to go off to defeat him.
The final battle at Lamar's mansion, where Wolff takes out an entire army of mercenaries guarding Braxton and Lamar, and later Wolff and Braxton's fight, in which the two are revealed to be brothers. Also, Braxton makes a Heel–Face Turn and doesn't bother standing in Wolff's way when Wolff kills Lamar.
Doubling as a Heartwarming Moment, near the end of the film we find out that Wolff donates most of his money to help autistic children. His sending the Jackson Pollock painting to Dana is another dual awesome/heartwarming moment, though a lot of people probably saw that one coming.
Dana fending off an assassin, even if only for a few minutes, thanks to quick thinking and using a stove grill and a toilet tank lid as improvised weapons.
Non-action example: Despite being lower functioning than Wolff and requiring special care Justine turns out to be his Mission Control and the one who assigns and obtains the info for his missions. All from an advanced computer system set up in her bedroom.
