what is this noise?

[r_dizzel*]

http://s903.photobucket.com/albums/ac238/r_dizzel/?action=view&current=MOV04719.mp4

i can hear this noise from under my car? any ideas on what it could be?

 

[Damo_Sport]

reminds me a little of the carbon canister sound

 

[r_dizzel*]

what does that do?^

any other ideas?