Random Riddle

She was on the first floor.
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There once was a woman looking out of the window of a skyscraper, enjoying the view.

She leaned against the glass pane and it popped out. She, along with the window pane, fell out of the 100 story building and hit the sidewalk.

With nothing to slow her fall or cushion her landing, she managed to walk away with only a few scratches.

How was this possible?