Hi Bryony,.....are they from one of the 'Cirque du Soleil' shows? If that's what I think it is, they were fantastic! Four of them, bouncing up & down like yo-yo's to an incredible songstress & the music.
In a 'traditional' Circus eg Ashton's, I always loved the beautiful 'dancing' Horses!
My next fave was the Trapeze Artists! Glad they had a safety net!
The movie, 'The Greatest Show On Earth', was filmed on site, with an actual Barnum & Bailey/Ringling Bros Circus! So most of the acts shown were 'fair dinkum'.
Fab film, rent it out if you've not seen it!