first of all, most of those tricks were either done by a) Mike Wilson, b) the Shrab Brothers, or c) someone that didn't affix an unconventional and confusing name to an otherwise standard trick. Call the trick what it is, not some wack ass name Jon forced announcers and judges to re-name tricks people have already done. Jon absolutely did not invent dub corks/ dub flips, he did however, help innovate them with a few other athletes including Mike Wilson, Jacob Wester, and the gentlman that did the risky flip all those years ago.
Second of all, Jon did attempt Chad's switch, however, he did not once land it. Switch misty nines and switch fives were thrown, but he didn't ski away from anything. As far as I know, the only trick he landed on that day of sessioning with Tanner was a spread eagle that can be seen in the credits of Teddy Bear Crisis.
Finally, his previous accomplishments and innovations are not the issue. The issue, or perhaps, topic of curiosity, is the theory that he's chubby. I was merely pointing out that, these photos would lead one to believe yes, he is a chubby guy. No hate. No bashing on his prolific career, simply stating that he does not look as fit as he once did.