The funniest event I encountered with a tube bursting was just after 9/11 happened. I was on an RN warship going south through the Suez a couple of days after 9/11 and understandably we went through with a heightened state of alert. We had upper deck armed sentries patrolling, amongst other security measures.
As we went southbound the temperature rose. Around midnight there was an almighty "Bang" and the sentries all hit the deck, pointed their weapons and started to radio in what they'd heard. They then started to investigate, and eventually found the source of the "explosion".
It was found that a tube's pressure relief valve on an old Gemini inflatable secured on the deck had stuck, resulting in the tube bursting and the closest sentry needing a change of underwear!
A bit of a giggle afterwards, but quite serious at the time given the situation.