Floor it!

You floor your accelerator and in turn floor the zombie, as it hits the front of your small car it bends double and disappears underneath. You slow down as you follow the road round, checking in the review mirror to see the body lying unmoving on the road, blood pooling out of it before it disappears from sight.
Well from the glance you got as it hit your car and left a surprisingly small sent, your 90% certain it was a reap zombie, though if it's a hoax and you just killed a guy in a costume... Well you're a complete knob.
But the adrenaline carries you through as you pull up outside Milly's house.