Haha, Keith could be a bit harsh on that old Hammond, couldn't he! One of the times I saw him, he stabbed the organ and left the knife holding some keys (standard procedure), and then climbed inside of the organ and lowered it on top of him (like a clam shell). I was more concerned with him getting a helluva shock under there than any fear of his knife play. Who else was such a showman with the keys!?
"OMG, where's my knife stabbing organ!?!?"
I remember Tony Banks using this switch trick on early Genesis records. It was the pitch bending of the day! Trippy!