They've had several COPV failures.

Including boring old nitrogen blowing up a Starship: https://www.space.com/space-exploration/launches-spacecraft/...

> "Initial analysis indicates the potential failure of a pressurized tank known as a COPV, or composite overwrapped pressure vessel, containing gaseous nitrogen in Starship's nosecone area, but the full data review is ongoing," the company wrote in an update on Thursday (June 19).

If you SCUBA, your tanks need regular checks (https://dan.org/alert-diver/article/inspecting-and-testing-s...), because pressurized air can indeed kill (https://divemagazine.com/scuba-diving-news/diver-killed-in-s...) if the tank fails. The gas for these thrusters will happily accelerate you with the same force they're using to make a car fly given the chance.