I've seen an austrian army try to start a real mosh pit. It was running in a circle which it repeated every single turn, raiding three villages/mines/farms in prussian territory and stopping in the exact same spot every time. It was a pretty good stack too, almost full, and it didn't break this circle of idiocy even when Poland-Lithuania took Vienna which was well within it's movement range in the following turn. Not even when Austria was down to one province.

Reminded me of Ralph Wiggum... Duck! Duck! Duck! Duck! Duck! Duck! Duck! Duck! Duck! Duck! Duck!