''Betcha thought I was a fool right''....den a smoking _|_ right in their face..!!!
Raise my right eyebrow and grin.
Depends on the scenario. I usually let it float for a day and bring it up when they think they got away with it.
I usually end the conversation abruptly and excuse myself. I don't want to be around someone who lies to me.
Call them out
Find out why, usually involves waterboarding
I call them on it, harp on them till they admit to it.