Bethenny Frankel Takes A Hard Fall While Roller Skating

Bethenny Frankel might've been groovin' out a little too much on the roller rink in New York City ... getting into the music before taking a hard fall.

The philanthropist/entrepreneur was at the Rockefeller Center ice skating rink for the opening of Flipper's Roller Boogie Palace -- where it's transformed into a roller rink. It's all the rage again ... decades after roller skating was a thing.

Bethenny was dancing away while putting on lip gloss ... then falling butt-first on the floor. Luckily, someone was nearby to offer the former 'RHONY' star an assist.

The event was packed with celebs ... Usher hosted the opening, and fellow icons Mary J. Blige, Dr. Dre, Floyd Mayweather, and Meek Mill all laced up.

Bethenny's quite the talented skater, although ice is more her thing ... she was the runner-up on "Skating With The Stars" in 2010 -- making it all the way to the finale with her partner, professional skater Ethan Burgess.