[John Milner]

I always thought it was if you were standing in front of the open suicide door and the driver took off you would be flattened by the door - versus the standard front hinged door where you would just be left standing there.

Of course if the driver was backing up your mileage may differ.

[Baynative]

How many times did we pull away from a friend in high school and get them running just fast enough to almost jump in the car so before we hit the brakes to make them run into the door?

(I can't count)