A great reason to keep your car clean....

My air conditioning sucked up a plastic bag in the vent. I had it on Max AC since it's like 100 degrees today and my air conditioning system sucked up a plastic bag that was loose in the front seat. Has anyone heard of such a thing? It's the only thing I can think of since the bag is gone and the air contioning made a horrid sound like when you suck something up in your vacumn cleaner.
Any idea on what I can do to fix it? Is this going to cost major $$$$ ??

Thanks in advance.