Luckily, it’s just a hydrogen leak and not something highly reactive that could explode just because you looked at it funny. /s

Hydrogen scares the bejeebus out of me. Did a high altitude balloon launch that was meant to be a hydrogen balloon. When attempting to purchase the tank of gas, the sales person went out of his way to educate/convince on the hazards. In the end, switched out everything needed to use helium instead. I knew nothing about it, but hydrogen tanks have connectors that are uniquely sized so that you can’t accidentally connect to a tank of hydrogen when you were expecting something else. I was convinced when he explained that the hydrogen fire has no color and is only noticeable when something else starts to burn. “You don’t want the first sign there’s a fire to be your arm burning”