Dangerous Glory Hole

You find yourself desperately in need of the bathroom while out and about and so make a mad dash for a public bathroom nearby. You pick a stall and conclude your business but quickly begin to hear some strange gnawing, snarling, wet sounds coming from the stall next door. That's when you notice the hole at waist level, it's inner circle smoothed with duck tape and with nothing but a mouth open in its centre. A tongue hungrily licks and slobbers all over the rim of the circle, it's teeth visible and so sharp, they might as well be shards of razor glass. It seems hungry and wont stop eagerly growling and licking at the air as if desperately in search of something to enter or press against it's mouth. What will you do?