forget the fact that you're paralyzed and run for dear life
we're stuck in a loving room with only that loving metal door and loving barred window
forgetforgetforgetforgetforge
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hopefully the metal door holds. um...
see if there's anything tall enough to help you get up to the crack in the ceiling
or get something and try to bash its claws to get it away from the window. Use the wood plank first and if it grabs it, well, it won't hurt as much as it would if you used the ladder piece
also where are you getting that image from