David Letterman's hobby since retiring from his CBS late show in May appears to have been growing a beard, but the host stepped back on stage again for a guest appearance on Steve Martin and Martin Short's tour in San Antonio's Majestic Theater July 10.
"I am so happy to be out of the house," Letterman said.
The highlight of his appearance was his presentation of a top 10 facts about Donald Trump. An audience member caught it on her cell phone camera and posted the video on YouTube:
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