Nobody did that actually, the cavalry attacked an infantry column and when the presence of tanks was revealed, the shortest route to forest and thus to safety simply led through the Panzer column for a part of the Cavalry force
I heard something also, but don't recall where, where they talked to some Polish vets, and they said it was nothing more than propaganda by the Germans to make them look stupid, as indeed it would be stupid to deliberately attack like that.
Nobody did that actually, the cavalry attacked an infantry column and when the presence of tanks was revealed, the shortest route to forest and thus to safety simply led through the Panzer column for a part of the Cavalry force
Although, i can't find any real proof of polish calvary rushing germans tanks it's is a fact they did out of desparation!