Minifig rotatable legs on a stick - what is this?

Question

What kind of piece is this? Emboss says "(c)2003 The LEGO Group" and there is a 4303 number below. I browsed Peeron a little but didn't find anything similar.

There are two red handles, one rotates minifig legs back and forth, second one make it straight.

EDIT: fixed part number, it is 4303, small chance for 1303 with overburned 1

Answer 1

The part in question shows up as a "Minifig Gravity Stunt Handle" (part number x817) on Peeron and a "Turntable Spinning with Sports Trick Handle" (item number bb128) on BrickLink. Looks like it appears in two sets:

• Snowboard Super Pipe:

  

• Skateboard Vert Park Challenge:

  

Answer 2

It's a "Turntable Spinning with Sports Trick Handle 2 x 24 x 4 1/3". I found that on BrickLink via browsing by colour, since there aren't a lot of tan parts and most of the categories are obviously not applicable (it's not a tile, for example). That page also lists the sets it came in (two of them), but none of the pictures show that part. But once you have the set number an image search turns up shots like these:

I looked it up because I've actually seen one of these in a pile of Lego and wondered what it was, and how it was originally used. It seems like a peculiarly useless part, and I couldn't come up with a use for it that made any sense.