The pun was very good though, you should've intended it.

Best pun I have heard in ages.

Haha, wow, what a fun discovery

Personally, I don't even like roller coasters.. I'd probably take a kidney stone to avoid having to go to space

I'm sure I'll end up there sooner or later though, that's where all the jobs are going to be

Chronic stone former here, and I can confirm this. That said, I did have a stone large enough to get stuck in the urethra -- not the ureter. The doctor was quite impressed. Unfortunately, I passed it in a public toilet shortly after leaving the doctor, so I wasn't able to capture and measure it.

At any rate, hydronephrosis is the real thing to fear in most cases.