Effect: Explosive force increased (sputnik from H2) 
 
Level: The Ark 
 
Location: First pick up a grav lift from the small building near where you fight the scarab. Now ?proceed through the level until you reach the second sloping hallway (stairway), you should see some partitioned risers (platforms) halfway down. The skull is on the top level. Toss the grav-lift on the right side of the hall so it lands on the fourth little green dot from the door. Then run, jump, and use the grav-lift to propel you to the top. You should reach a ckeckpoint just as you enter the room so it you miss just try again. ? in between the "?" is the parts i dont get =p