[EdZ]

With a wet mop

Or a towel tied to your clubhead...

Or hitting shots with your right thumb and forefinger off the club.....

Or by putting your clubhead around the string of a bag of balls and dragging it around....

Or by taking practice swings in a pool...

Or by having someone grab your clubhead about about halfway down and trying to pull it down into impact (as long as they resist at the proper angle)

Or by using some elastic/rubber tube/bungie cord in a similar way...

Or by hitting your 160 club 100 yards in a full motion but 'slow motion' swing.....