1st fast action 20m (mobility roll, max 4 successes pushes that to 60m)
2nd fast action 20m (mobility roll, max 4 successes pushes that to 60m)
total max 120m
per wikipedia on 100m dash. "The current men's world record is 9.58 seconds, set by Jamaica's Usain Bolt in 2009, while the women's world record is 10.49 seconds set by American Florence Griffith-Joyner in 1988"
A level is supposed to be olympian.
Most pushes I have seen are single or double success. So say both moves are double successes, that would be 80m
And keep in mind -2 for backpack, and terrain modifiers for the hex you end the 20m in for pushing further with that mobility roll.
One thing to note as well, is that nobody was shooting at Usain Bolt when he set those times
People can push their bodies to pretty amazing levels when under extreme duress and under massive adrenaline bursts.
But yeah, it would be incredibly rare for anyone in-game to not only not have any backpack on, not have any terrain modifiers (ie. sprinting down a flat untouched asphalt road) AND manage to roll four successes twice in a row. If anyone happens to do that, let's just give them the win