Here is a water heater explosion film from years ago. Watts brought the original film to one of our plumbing contractor meetings years ago. Quite impressive! Also guys why don't you go see if you have a temperature and pressure relief valve on your water heater and scrap those old air compressors that are questionable. Hope the link works for you.
https://www.youtube.com/watch?v=5pVQryuKMj8