While sitting there we suddenly heard this LOUD crunching and rattling noise, which kept getting louder and louder. As we watched, one of Frank's remote-controlled cars (which makes more noise than a garbage truck) came rolling slowly around the hot-tub. With a running digital voice recorder duct-taped to the roof.
I have to give Frank points for innovation, but a "FAIL" for execution. If you're going to spy with a remote-controlled toy, use one that doesn't sound like a garbage disposal.