moneyburner
FRIEND
Western Washington
Most door operators can be wired generally so they do one of two things; it can move only while holding the up or down button (as long as the up or down limit isn't open), or it can be wired so you hit and release the button and it will continue moving until the up/down limit switch is opened, like most garage doors. If it's wired like the second method, a required bit of safety equipment is an obstruction sensor that reverses the door if young Billy or Scooter runs under it while it's coming down.
I'll take a stab that this one is wired like the second method, but someone either couldn't figure out how to properly install the sensor, disabled it, or it wasn't working. Another good reason to inspect things now and then, which might prevent this sort of comedy.
Which stops being funny the moment your airplane or truck gets squashed or someone gets hurt.