This costume is a lot easier to wear than toilet paper.
They just lay there in their uncomfortable wrappings, staring at the wall in front of them. Just think of all that the mummy has gone through! That would get pretty boring. They were trapped in their before the age of smartphones, they don't even get to play phone games while they are in there! Sure, it might be chasing you all over the place, but you have to look at things from their perspective.