Great work on the animation but the joke was only mildly amusing at best. The joke was predictable so that removed the surprise factor and deducted funny points.
Additionally, the video was scientifically inaccurate. You cannot open the emergency exit during flight due to cabin pressure (Smith 2013), especially at that high an altitude. The interior pressure fixes the door into place with such a large amount of force that even a champion bodybuilder can't budge it open. In order to open the door you'd have to force the pilot to depressurise the cabin first before you can open the door. If anyone's wondering how skydivers can dive off planes, it's because the planes they leap off from are not pressurised.
I'm giving most of the points for the fluid animation, so good work on that. I hope your future animations are funnier.
Smith, P. (2013). "Cockpit Confidential: Everything You Need to Know about Air Travel: Questions, Answers, & Reflections". Chicago: Sourcebooks.