The first version of my app Huphup CRASHED at the start of my 10k race. I was waiting with thousands of other runners at the start line and I could not get my own app working. I spent weeks, months, preparing for this race. So why did it crash? The app did not yet account for the many friends and family that would send me cheers during the run. Well... of all the reasons your app crashes, too many users is like a pretty okay one.