In Iceland I saw two of these height adjustable resi-pits. (The lift mechanism was broken, on one.)
It’s Cirque du Soleil level technology!
Click PLAY or watch it on YouTube. (best shown at 1min 20sec)
They were originally marketed for Team Gymnastics, a sport that often sets-up and takes-down every day. But the very best use I’d say is for Vault training. They lift up as high as 2m 20cm.
Gymnastics Coaching.com 