How do I get past the guard

Hint 1 of 6:

Easiest way is to just sneak at the right time.

Hint 2 of 6:

Next hardest needs two items: a jockstrap and a rock.

Hint 3 of 6:

The jockstrap came from the space station, the rock from the wall.

Hint 4 of 6:

Throw the rock with the jockstrap to distract the guard.

Hint 5 of 6:

Hardest of all, hit the guard with the jockstrap-powered rock.

Hint 6 of 6:

Use the keycard from the dead hovercraft guard to open the door.