This sounds more like a concept for a comedy than a horror film.
"UH-OH, you killed her with a donkey punch! Time for some wacky adventures across the country until it turns out that she's alive at the end!"
spoiler (click to show/hide)
Donkey Punch 3: Cleveland Steamer
"Oh God, I was aiming for her chest! I didn't mean for it to choke her!"