A character should not allowed to have assumed feats in excess of their seen-on-screen ones..
But feats below that tier are acceptable. IE:
Which are within McClaneian capability range?
A) Wrecking buildings, highways, Jets, Helicopters, ludicrous luck and escapism feats, blowing up 747s, defeating terrorists, miltary, mercs, etc etc
B) Flying to Warp 8 propelled by only his anal gasses, to Pluto and back in under 7 seconds, whilst solving where Shergar is, solving the Kennedy assassination and commissioning a new series of "Married with children", saving the world by bringing the benevolent wisdom of Al Bundy back to the masses.
C) Washing his car (A basic feat that is known to be within his capability like that shouldn't be denied be cause it didn't take place on screen.)
A is obvious and undisputed.
It would be ludicrous to accept B.
It would be ludicrous not to accept C, if you accept A.
Pretty easy to see when looking at it like that, huh?