The images are:
- Imagine the wedge's face is a mirror and make sure you can "see your reflection" all the way through the swing. Since you have to open the face a lot to make a flop shot, this basically means your lead wrist is pretty much FLAT all the way back and then CUPPED from impact to finish. It sounds a bit awkward to me, but the flop shot requires a lot of wrist action and this image may work for you.
- The other image is to imagine that you have to sling the clubhead under a waist-high rope strung between you and the target. This one seems to use a less exaggerated motion, but that may just be me.
Of course, don't forget to (a) use your most lofted wedge and (b) put the ball forward in your stance if you want to make a flop shot. If you put the ball back in your stance like you would for a chip shot, you'll never get it up in the air.
Yeah, I know that's basic stuff. But it's usually the basic stuff that trips us up.