i remember just last year i went through this phase where i would try to sneak up on the doors (so they wouldn't open) If someone passed by or i accidently moved and the doors open i would scream and start over. sooner or later noone dared go near the automatic doors when i was there. This drove my parents crazy but it was fun!
Honestly, it's like I'm a minute behind someone and the door opens fine. Then I get there and nearly walk into it because it opens so slowly. I think I'll take your advice and sacrifice my little brother