You get many opportunities throughout the game to get this achievement. All you need to do is sprint behind a Wakcha and attempt to jump over them. You won't ever do it and they'll kill you every time, but it's enough to get the achievement.
The first opportunity to get this is in the prologue. A Wakcha tribesman leaps out of the flames of the hut and blocks the path. Leave the hut and extinguish Teku's candle. Instead of following the tutorial's instructions, sprint towards the tribesman and try to jump over him.