The problem with killing a spider that has mockingly hopped onto one’s steering wheel is the fact that, unless one can locate his dead remains on the floorboard, he will inevitably pounce onto the seat of one’s car in what appears to be a fury of fangs hungry for revenge.
The problem with killing said spider aiming to attack one’s thigh with his fangs, is that, again, unless one locates his dead remains on the floorboard, he will continue to hop around inside the car – slightly stunned, but fully mobile.
Let it also be stated that simply tapping one’s foot in his direction will do nothing to destroy this determined spider.
Unless one smears his body in a streak along the rug of said floorboard, he will, in fact, remain alive – and eager – oh so eager – to defend his life.