A Chinese man who chain-smoked his way through a marathon was disqualified for smoking on the course
(www.businessinsider.com)
I just moved to vaping and away from smoking. There was no big accomplishment here, unfortunately. Meh, it's just a risk tradeoff as nicotine isn't completely harmless itself. Without getting into details here, quitting nicotine is not on the table for at least another year.