It'd be kind of tricky, if it's doable at all, since our measuring stick is Kris.... Except, we can also control move Kris not only left, right, but up & down as they fall.
Meaning we can control the rate at which they're falling. Not completely, but to a significant extent.
See, normally to get distance, you'd measure the timeframe, & probably get a speed somehow. Ex: Assume fall speed or determine terminal velocity.
Since Kris is how we'd measure the distance, but since we're controlling how fast they fall to a great deal (& we fade out before we see them move to the bottom of the cliff regardless of position.), this kinda really muddles determining the distance.