Carly Fiorina When the Walls Come ... Tumblin' Down

9/28/2015 6:15 AM PDT

Carly Fiorina -- When the Walls Come Tumblin' Down (VIDEO)

It's curtains for Carly Fiorina's presidential campaign, that is if she believes in omens.

The GOP candidate was stumping in San Antonio Sunday night -- speaking to a female business owners convention -- when she was rudely interrupted ... by her staging falling apart.

The curtains rigged up behind her came crashing down, but you gotta see Carly's reaction. She didn't exactly run for cover -- nor did anyone run to yank her to safety.

Carly dodged a direct hit, but likely learned a lesson -- in politics, someone's always gotta have your back.