Question: do you ether get worried you will get hurt

I have worked with some fairly dangerous equipment in my time but you get a lot of really good training to prepare you. If you are very careful and follow the rules then you are quite safe really. Whether you’re working with dangerous things like very high voltages or explosives, there are well-established rules that have been worked out over years of practice that you can use to keep you safe. I always spare a thought for the engineers and scientists that came before me who probably made a few fatal mistakes before working them all out.