top hat trick

When someone pulls a lie out of nowhere within a few seconds.

Person A: I can't believe what Person C said to me.
Person B: What did he say?
Person A: I told him yesterday about the report, right?
Well, when I told him about them this morning, he said nothing for a few seconds, then said, "I had to go to an important family meeting!", even though he never said anything about it yesterday.
Person B: He's lying.
He's doing a top hat trick.