The Mold

You begin walking away from the stream and even deeper into the forest in hopes of picking up the mold monster's trail once again. As you walk a loud noise startles you and you stand still. The noise comes from behind you, and sounds like a low roar. You hear the noise again, this time louder than ever. Shivers run down your spine as you contemplate what foul beast could possibly be behind you. Whatever it is it must be hungry. You slowly turn around and see about fifty feet away a large black bear. It is approaching quickly and seems quite agitated. You haven't much time and must think of what to do. You can play dead and hope it passes by, run away as fast as you can, climb a tree, pick up a large branch and wave it at the bear, or jump back into the stream hoping it won't follow. How will you extricate yourself from this sticky situation?