I was a security guard at a big ritzy condo with access to all of the keys when one of the apartments was burgled. Two local detectives showed up and questioned me with a polygraph. I failed to suspend my disbelief. It seemed like bullshit from the start. I lied about smoking weed.

Then they told me to wait. An hour later one of them came back and told me I had passed. I had the impression he was watching me very carefully for some kind of relief, and that moment was the actual test. I laughed at him, which seems to have been the right answer.

I still think it's an interrogation manipulation prop, and the courts that don't admit polygraph results have it right.