Raiders of the Lost Ark: An Extra Is Actually Wearing Jeans
There is a possibility that you will not see it if you do not look very carefully. In the background, there is an extra who appears to be wearing jeans and a T-shirt. You can just make out what he is wearing.

Raiders Of The Lost Ark
Due to the fact that the narrative takes place in Egypt in the 1930s, the clothing, which would be socially acceptable in today’s society, is, at best, inappropriate for the setting of the film.