"Nothing much" says Rick in your head, "Just THIS!"
You feel Rick sieze control of your body and you suddenly find yourself leaping up and doing a backflip in mid-air! Before you can hit the ground, Rick turns your hands downwards and pivots, leaping you forwards in a manouever you had only seen done before on anime. You marvel at how light and flexible your body is in this costume before a sudden surge in sunlight and the feeling of wind against your body makes you suddenly aware of some very important facts:
1) Your room is in the attic, effectively making it on the third floor of your house.
2) Your window was open.
3) Rick has just launched you out the window.
"Riiiick!" You yell out as you plummet to the driveway below. Was he trying to kill you? Was this some sick revenge for getting him turned into a costume?
"Oh relax." Rick's calm voice responds as you fall. "Just wait and see."
You don't need to to wait for long. Half a second later, you strike hard against the ground. Instead of the expected bone-breaking splatter, however, you are incredibly surprised when you bounce off the ground like a superball! The bounce sends you into the air before you come back again--which of course makes you bounce back up. This cycle repeats a few more times before you lose enough momentum to stay grounded.
"I'm rubber, remember?" Rick snickers. "So when you wear me, you're rubber too! Light, durable, stretchy, flexible and of course, bouncy! Neat, huh?"