The driver of this Setra Motorsport BMW M3-R seems pretty confused when he notices something’s missing.

Here’s why you need to make sure your doors are on tight and closed before you head out on track. Otherwise, you might lose that door.

Setra Motorsport said on that the car was traveling at 280 kph (roughly 174 mph) when the door blew off.

Look on the bright side, though. All that air rushing into a sweaty race car cabin must feel pretty good.