As dumb an idea as it was to make a giant green mousetrap, it was even stupider for whoever's piloting the Hall of Doom to stick their tentacle right on it. There wasn't even cheese on the thing. They stuck their tentacle in the mousetrap to get nothing. Captain Cold: "Luthor! A mousetrap! That means there may be cheese! I'm sending in a tentacle for a closer look!" Luthor:"It's worth the danger, but be careful. If something grabs the tip of one of our tentacles, it renders the entire base helpless."