Not fast enough TO reach you in time to stop you.
Missing the "to".
Also... I got to the second chance of talking him down and I only had one option. Is it possible to have another option?
I assume there's a second option that I didn't qualify for (I got this as my first actual mission).
Perhaps have another option there just so the choice doesn't seem pointless?
EG: Leap and try to grab him (Fleetness check) - Or an Instinct check if you think that's more appropriate.
If they choose that option, it's a desperate gambit. One check is made against their listed skill. They make it and grab him. They fail and he falls.