2000 Ford Taurus Transmission leakage

I got cut off two days ago and I hit a curb to avoid hitting the other driver. My front passenger side tire popped and since the incident there's been transmission fluid leaking under the car. I checked the gasket, and it looks ok, but to check it we poured a bit of transmission fluid in and it came right out the other side. But when I check the tranny fluid under the hood, it says I'm about half full.

Any ideas on what it might be?