Hall of Infinite Doors

You inject the green liquid into your blood stream. The area around the injection site quickly turns green and liquidy then to stone which crumbles away. You think fast, pulling off your belt and tying it around the upper part of your arm, where the infection has not spread. You arm is soon gone. you look at the floor and notice that the crumbled pieces of your missing flesh have melted straight through the paper floors into a black abyss.

Do you...