“Late Show” host Stephen Colbert’s audience booed heartily at the very mention of the name of tech billionaire Elon Musk.

Even Colbert seemed impressed.

“That had a tail on it,” he observed. “I did not see that coming.”

Musk sent an email over the weekend flagged at “high” importance to all federal workers demanding that they list five accomplishments over the last week or they would be out of a job.

“Now obviously the only proper email response to that is: What did I do last week? Your mom, your mom, your mom, your mom, and your mom,” Colbert cracked.

See more in his Monday night monologue: