Help! I've Fallen and I Can't Get Up

I was walking up the steps at a municipal building and an old, heavy lady had fallen. Two guys were there helping her but I hung around a few minutes to see if there was anything I could do. I really didn't see how I could help except maybe to call for help if she decided she needed any. Then I noticed one guy had a cell phone on his belt, so I trudged by and entered the building.

I still felt weird moving on and leaving the scene. When I left the building like 30 minutes later, nobody was there. I hope she's alright.