Caving with a boat (KA cruise 1.1)

It was one hell of a experience, if the water was just half an inch higher it may have been impossible to get through. In case I did capsize, well... don´t wanna imagine that. This tunnel leads the river past the freight railline, without any real alternatives. Stepping out of the water would mean a mile long walk around, on streets with few bypassers who could help, going back would mean complete disasembly (not to mention the current).
Without alternatives I decided to squeeze through, only worried whether the damn thing is getting even tighter towards the end (which seems to happen).
Only good thing; it was completely full of water recently, so no spiders left on the ceiling.
Stopping was impossible, the current would lead to capsizing quickly.
At least I understand whats so tempting to squeeze into tight caves, I saw the thrill, without real danger.