Leah Remini Takes a Tumble After Getting Scared by a Creepy Clown on 'DWTS'

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If we learned anything on this week's Halloween-themed Dancing With the Stars, it's that Leah Remini would not do well if attacked by a monster.

Leah, who has been filling in for co-host Erin Andrews, was interviewing Tamar Braxton and her pro partner Val Chmerkovskiy following their dance when someone in a latex clown mask snuck up behind her to give her the scare of her life -- and her reaction is amazing!

WATCH: The Most Elaborate Celebrity Halloween Costumes of 2015 So Far

Leah was so startled that she dropped to the floor like a sack of terrified potatoes -- which, as she later pointed out, is the worst reaction a person could have when confronted by a living nightmare.

Turns out the man in the mask was none other than pro dancer and DWTS troupe member Sasha Farber, who later apologized to Leah on Twitter, explaining, "It's Halloween week, it had to be done."

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Scaring people is all part of the DWTS Halloween tradition! Every year around this time things get spooky on set. And by spooky, we mean the cast and crew go around trying to get everyone else to wet themselves by jumping out of boxes and unexpectedly appear from behind doors in horrifying Halloween masks.

WATCH: Bindi Irwin Delivers Amazing, Bloodthirsty Performance for Halloween-Inspired 'Dancing With the Stars'

Although Leah falling to the floor in abject and startled terror was hilarious, the night's best moment was Bindi Irwin and Derek Hough's powerful, bloodthirsty Argentine tango that won them a perfect score from the judges for the second week in a row.

Check out the video below to see Bindi and Derek's vampiric performance in all its gruesome glory.

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