According to Jim: Season 5, Episode 6 - ProjectFreeTV

5 - 6: Anec-Don'ts

Cheryl, upset that Jim thinks her daily anecdotes are boring, steals Dana's story about meeting Oprah. Jim, now determined to out-do Cheryl, makes up a story about his construction office catching fire. But when Cheryl take the kids to see the damage, Jim and Andy, who are scrambling to make it look authentic, end up setting a real fire.