Something keeps hitting my hood!!!

Well, sorta...Heres the situation. Everytime i turn off my car i hear a thump from above...I have no idea what it is, it's not really a big deal, just a bit of a annoyance...Oh keep in mind my sunroof is broken, thats really the only thing i can think that could do it...but whats up there that would do that?!?

Thanks in advance

[MikeTangas]

Are you sure it isn't one of the vacuum operated flaps in the dash slamming shut once the vacuum is gone (from shutting down the engine) due to a large vacuum leak? Sound might be reverberating off the windshield, through the defroster vents, could make it sound as if from above.

heh...yeah....

and how do u suppose me going about inspecting/fixing if theres a huge vacuum leak??

Thanks for the info