Not necessarily a mechanic, but a while back in GR: Wildlands I was stirring shite up in a small, remote desert town, and drew the attention of the Bolivian task force known as UNIDAD. The result of said shite proceeded to get real rather quickly, and it is wasn't long before I realized my four man squad would probably soon be severely outgunned. I booked it over to my lowly chopper, trying to avoid as much attention as possible on the way to facilitate a successful takeoff.
It was futile attempt. UNIDAD had picked up on the whirring of my propellers and started laying down heavy machine gun fire my way from their own, vastly superior chopper. While I was at least able to get airborne, it wasn't long before my rig started smoking and sputtering from the damage, but not before I was able to gain an elevation advantage, and maneuver directly above them. All I can remember thinking was, "If you sons of bitches are gonna take me down, then I'm taking you down with me!"
As fate would have it, my chopper finally sputtered its last breath right when I was directly about 30' above them; enough elevation to come crashing down to ruin their day. My choppah vertically collided in a mad, desperate descent onto their props, causing them to tear apart and spark like an overloaded transformer on a power line. It appeared to happen almost in slow motion as both of our vertically tangled rigs came crashing down in a glorious symphony of smoke, fire and destruction. The best part is, I was able to escape before my chopper exploded on top of its unlikely prey.
So, in short, I'd say that sometimes random acts of desperation that somehow end in spectacular fashion can feel pretty badass.