Well, the Ice Battle without a small 800 years ago was, there is a more refreshing example.
We were somehow at excavations not far from those places, but not at Wonder, but closer to Pskovsky. They cut out the "language" (a grandfather from the local, he was already a conscious boy in those years), he told. To them in the village (on the shore of the lake) faschies on dogs on the ice jumped. Where they came from is unknown, because we took them on the shore and drove them all down. And it was April 30, 1944, the ice was all standing. And I was small (in the early 1980s), the rivers opened in May. So this is a Russian spring :)