The Depths of Human Ingenuity
In the grand tradition of discussing dildos on this blog, I give you a look at what is certainly a most perplexing device. But wait! Before you click on that link, let me say that it contains possibly offensive material, namely some X-rated illustrations of ways one might, ahem, use the Jack Hammer Johnson.
If you are a little squeamish, or just do not wish to have the URL for a sex toy store appearing in your internet browser's history, I will describe the thing as best I can. It's like a dildo on a pogo stick, sort of. Now, you're going to click the link, aren't you? Go ahead. It's worth possible future embarrassment. It's that funny.
I personally would not attempt to use such a device. I'm pretty sure I'd injure myself somehow.