Rick Mercer risked his own safety (and sometimes Jann Arden’s) as he trekked around Canada, from getting Tasered to wearing a beard made of bees to climbing aboard “the train of death.” At a live event in Toronto last week, Mercer told Matt Galloway why he always leaned into the wild things people get up to in small towns — and how he never quite figured out what it means to be Canadian, but he wouldn’t want to be anything else.