In the video of the woman who was set on fire on the subway, why is she standing up and not appearing to be moving or screaming? /u/Big-Caterpillar295 No such thing as stupid questions

I watched the disturbing video against my better judgment last night. The poor woman who was set on fire was standing up for a long time, not flailing around or screaming. Why?

I watched the disturbing video against my better judgment last night. The poor woman who was set on fire was standing up for a long time, not flailing around or screaming. Why?