On the menu, go to training, then go to surviovor. When you start, turn right or left say im going left, and keep going up the ramp and turn left, there will be a large thing with circles on the bottom. Near that, there is a verticle block (oblong).go to the other side and jump up onto the ramp. (jump=double tap touchscreen)go behind the oblong and then walk through it. it is a glitch.you will fall through under the ground and die.

Note: This might only work on demo.