Bochum ban fans from jumping in unison over sickness fears
The German club Bochum have banned their supporters from jumping up and down in unison in part of their stadium as the movement of the stand makes some spectators feel unwell.

TL;DR
- Bochum has banned synchronized jumping in the East Stand's standing area.
- The ban is due to concerns that the movement of the stand can make spectators feel unwell.
- Engineers found that synchronized jumping creates a "trampoline effect."
- The ban will be lifted upon completion of East Stand renovations in 2028.