Mark Dowds was out of shape and nearing 40 when he discovered ultra-marathons and has now run several dozen of them.
Mark tells us what it's like to run 50km (or more!) in steep terrain and challenging conditions, the extreme emotions you experience and how he maintains his enthusiasm for both training and competing.
BTWs include Guinness, gummy bears and the monarchy.
In the moment of meta Katie gives three tips for how you can enjoy being bad at stuff.