Once showerd for 1 hour... I didnt notice time. When I sick I just shower and I for example lose my headache. But I once on a campsite had only to shower for 30s and then switch so my friend had 30s too. And we were done early... (was 10 years old?)
I showered for 10 seconds in a stall i went in locked in on the shower 5 seconds later closed it, worst shower i ever had