The Real Housewives of Beverly Hills were in for a shock as they filmed their latest reunion episode, during which cast member Sutton Stracke suffering a medical emergency in the middle of filming.

A dramatic teaser released Wednesday gave fans a glimpse at the terrifying moment on the season 13 reunion, as Sutton is heard making a wailing sound while seated next to host Andy Cohen, who had a separate chair to himself between sofas for the housewives.

While it wasn't exactly clear at first what triggered the incident, it appeared to come just as Kathy Hilton — who reunited with her sister Kyle recently at the People's Choice Awards — was invited to join the ladies on set.