Yes, trains!

Maybe in a very, very large circular track. A huge circle.

And fast. Super fast. Make them faster by making them lighter. Smaller. Super tiny. So light and fast.

A teeny, tiny, light train going super duper fast in a very large circle.

Sure hope it doesn’t smack into anything while going top speed. Or maybe it does, so long as we measure it.

Yessss run the trains through the collider

I like trains.

We already have plenty of trains in Switzerland, they’re just expensive to ride

There’s this (true) anecdote that precision measurements at CERN/LHC need to take into account the schedule of high-speed trains in the area because they cause tiny, yet measurable disturbances in the power grid.