Dimension has a lot to do with how an object performs. Take a stick. Slap it against a person. Watch it break and the person beat the shit out of you.
Instead of slapping, however, try jabbing with its length. Suddenly, the stick doesn't break as easy and may also puncture the person. Do it right, and they may not be able to beat the shit out of you even if they wanted to.
The engines sheared off of the wings when they hit the ground. Four bolts with a specified shear force hold the engines to the wings. They shear away from the crash specifically to avoid the potential for fire after a crash. Of course, the engineered case is an aviation accident - collapsed landing gear on landing or a forced belly-landing. Not a turbo slide into the side of a building.