This is the sci-fi short film Bar Talk, via Dust.
It was written by Joe R. Lansdale (Bubba Ho-Tep short story), directed by Lowell Northrop (executive producer of Hap and Leonard), and stars Timothy Brennen and Ian Gary. Check out the synopsis and short film below.
"In a dusty Texas bar, a chatty stranger insists on striking up a conversation with the man sitting next to him. The more this stranger talks, the more obvious it is he's not from 'round here. Heck, he's not even from this planet! Based on the short story by Joe R. Lansdale (Bubba Ho-Tep, Hap and Leonard)."