[Elspode]

This is a small-scale example of similar events that are believed to have created, among other things, the entire Scablands of the Columbia River Plateau in Washington State and the Snake River Canyon through Idaho. Both are examples of the unbelieveable amount of scouring that occurs when unimaginable quantities of water and rocky debris are released in a short time.
(rocky debris increases as the water and the already-present debris rip to shreds the watercourse which the flood follows, causing even more impressive scouring)
Ice Age glacial lakes are believed to have created both the Scablands and the Snake River in a very few years, and perhaps as little as a very few *weeks*, as opposed to the many thousands of years such erosion usually takes, due to repeated outbursts and refillings of the Ice Age glacial lakes. There's lots of stuff in geographical literature about such lakes, including Lake Missoula (in Montana, obviously), Lake Bonneville and Lake Agassiz, all of which left obvious evidence of their catastrophic outbursts.

Of course, these lakes were many, many magnitudes of scale larger than the one shown in UT's pics (Lake Agassiz rivaled Lake Superior in volume), but man, those pics are awesome, UT. And relatively safe, compared to the Ice Age events.