Glass doors. Let your guard down, and they will punish you.
This poor girl learned that the hard way as she took her eye off an automatic, sliding glass entryway for one second, then lost her bearings completely.
Wait ... which part just opened? Is that ... BONK. Oh.
Major props go to the guy who comes in from the opposite direction afterward - amazing how he negotiates the door so effortlessly - and to the guys who cleaned the glass. Give them a raise, building owners ... they must be pretty spotless: