at first thought, i think: monocle-laser to kill diseased, hat-help improve jumping skills, walking stick-hangs on to cliffs. But unfortunately none of those things were correct. :(
following Lugalid's comment, it's the gigantic red blazing laser that burns you to smitherens, not the long immovable electric spikes (nor is it by seeing the trollface at the bottom when you activate the laser, either).