Use Dan-Hand to enter the display of the lunar surface. Switch back to Headless Sir Dan for a minute and check out the three buttons outside the display. Stepping on a button will cause a Martian to pop out of one of the craters in the exhibit. It cannot go anywhere, but he starts firing a ray gun at Dan-Hand! Quickly switch back to Dan-Hand and maneuver yourself directly between the rocket ship and the creature. Although the martian is out of your sight, you can hear when it fires its weapon. Jump when you heat the sound and the energy hits the rocket, killing the martian.