Animalistic Terror

You wake up in a dark alley with a painstaking headache and no idea how you got there. You look around for clues but only see darkness.. Until a single light source illuminates itself. You feel saved, until you realize it's not human. The light source gets closer and you hear the sound off clunking feet approaching, you see a switch on the wall further ahead and batteries on the ground next to you.
What do you go for?