At work we had a hydraulic accumulator with low charge pressure. The place is pretty bad about expecting someone to know how to do a job and expect them to do it without training. There is a pressure switch set to 80 bar and if the precharge pressure is below that, the hydraulics won't fire up and will give a low accumulator precharge error.
The person sent to charge the accumulator filled it with oxygen. When the pump was turned on, and higher pressure built up in the accumulator and blew up. The fitting blew off the charge end of the accumulator and shot out high pressure fire & exhaust. The bladder rubber got blew into the block at the other end of the accumulator. Luckily no one was injured. Although the oxygen and nitrogen cylinders have different fittings on the bottle, the kit to charge the accumulators had fittings for either one. I learned years ago that nitrogen was used for accumulators because air and oil had the potential of compression ignition, that evidently applies to oxygen in the nitrogen too.
Perhaps BottleBob can invent nitrous oxide injected hydraulic units that work something like the Paslode cordless nailers! :-)