>Hillary ded
One of them
It's common procedure.
The cloth is to calm the bomb down and get it to sleep, ensuring a more stable diffusion.
This picture don't show it, but usually there is a guy close by softly singing lullabies.
This technique is mostly for younger bombs that haven't learn to control their emotions yet, but many places do it regardless as a safety measure as some bombs has had a rough upbringing stunting their emotional development.