That extra pint when your other half is waiting at home. The peer pressure purchase you’re still not sure you really wanted. Or running a series of gruelling ultra marathons all over the world.
OK, the last option may be slightly more unusual, but it’s what happened to Tarne Westcott.
A pub meet-up with his friend Dharmesh Mistry transformed him from reluctant marathon runner to 100-mile ultra finisher...