My guess is it's not trolling. I think he's young, even younger than he claims. He's probably lurked a while or been kicked off/ flamed hard on other boards so he learned to make claims that would make him sound knowledgeale enough. i.e. 6th cycle, low bf percentage, etc.BUT that theory doesn't explain him posting a pic that disproves everything, so who knows.
Being scared that your arm and shoulder are going to swell up like a balloon amd pop could make a person not care much about the internet persona they've tried to build though.