Here is a great picture from the glory days on the Hudson demonstrating what happens when your runners are too tight in the chock and you go up in a hike.

They say runners should be just tight enough such that the front of the runner slowly drops under its own weight.
The folks standing on the plank are probably yelling back to the skipper, trying to warn him of the crack which is about to swallow the steering runner. Hopefully the yacht behind sees the crash and has time to change course.
Just another fun day on the ice.

Speaking of which, Friday is shaping up to be a good possibility at Damariscotta, and then again Tuesday-Wednesday next week.
Stand By!