This is Thomas Cantley and his massive ball.
Cantley, who calls himself Ballsy, was diagnosed with stage III testicular cancer in 2009.
In an interview with Men's Health, Cantley revealed his left testicle swelled to the size of an orange and became so painful he couldn't put trousers on.
When he eventually sought medical help he was told the cancer had already spread to his lymph nodes, and, if remained untreated, would spread through his body and to his brain.
Here he is explaining his awareness campaign.
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Cantley says his cancer has given him a purpose and he now wants to connect with youth to educate and inspire them.
So last month he embarked on an epic journey: to push a 6ft inflatable ball from Los Angeles to New York.
He called the project Ball Push.
He's encouraging people to sign his ball as part of his campaign to raise awareness.
Ballsy undertook a similar challenge last year, when he pushed his ball across Canada from Toronto to Vancouver.
Speaking to Men's Health in 2013, he said of his massive inflatable: “It’s my reincarnated left testicle. I call him Lefty.”
As with his current project, Cantley filmed his Canadian trek so he could turn it into a documentary.
He wants to be a voice for testicular cancer, and is determined to connect with people "on a personal level" during his trip across America.
