What naturally produced drug causes a 'tingleing euphoric rush' through your body, as well as a 'wave of goosebumps'?
I've always been interested in this sensation, two of the last times i can distinctively remember feeling it are:
Watching the movie Philadelphia, when you hear the courts verdict on Andrew Beckett's (Tom Hanks) case.
A horse I backed won narrowly after a neck to neck final dash.
Sorry if the question seems pretty basic, I couldn't think of a way to better articulate it.