Dropped A Small Hard Object Into The Front A/c Ducts! Help!

[musri]

Ok so I own a Lexus ES300 and a few days ago I dropped a small rock (about the size of a dime) into the front A/C vent, the thin one that goes along the windshield which helps to defog it. I started driving a bit and I could hear the rock bouncing around and then very recently I have started hearing weird noises that sound like they are coming from the same area! Please help me how do I take it out? Do I have to take this to a Lexus mechanic? How much will it cost?

[1990LS400]

You could pull the HVAC blower motor and see if the rock falls out. If it does not, reach up and to the left into the main HVAC unit and feel around.

If you have access to a borescope, you could try shoving its tube down the vent and taking a lookaround before you start tearing things apart. I've got a 36 inch one like the one pictured at http://www.voscope.com/page11.html