

To be clear, even if you have a door that opens outward, the doors first open inwards before rotating to go back out. That way pressure will always keep the door from opening when at a high altitude.
Veritasium did a video on it: https://odysee.com/@veritasium:f/what-everyone-gets-wrong-about-planes:e
Life pro tip: bend the prongs a little to give your device more grip if you encounter outlets like this.