an electro cardiograph, it's a tracing of the electrical il impulses from the heart given off by the heart and this chap came in he'd never had one before and he was nervous anyway, so I'm trying to put him at his ease and I, I put, you have to put like a rubber band round their arms and legs and attach erm electrodes to them, you don't feel anything, you're only measuring the electrical impulses given off by the heart