Excessive?
It's the very same kit as used by all the mnt bike photographers you'll come across on your travels for this sort of trail.
In this case, SB800's and Wizards set at 1/4 and 1/2 power typically, anything else and it's overexposed.
If you view the images, they're correctly exposed.
Odd, but that's the very first whinge I've ever had from a rider in all the thousands of pictures I've taken over the years of photographing these sort of events, be it Sleeples, Mayhem, KonaMashUp, Meridas, etc etc.
One thing you need to be cautions about as a photographer (and yes, I have 3x types of insurance before you ask) is not placing the flash in a position where it could physically endanger someone on a decent (typically) and not "blind" them before a black section or a tight turn in the trail.
The more events you ride like this, the more you'll appreciate what I say is the norm when photographers cover mtn bike events. Just be thankful I didn't wheel out the portable BOWENS studio flash heads and soft boxes!
If you raced the Whyte's Enduro at Donington Park in the summer, that was a one box / one Traveller set up I used there on the slow sandy corner. A wonderful softness to the light, with an even spread, no hot-spots, quick re-cycling times, heaps of power for f8 and a natrual quality that can't really be matched by £350 hotshoe flash units as I used yesterday.
What he might have been referring to is that on the front-on light I tend to apply a home made snoot to cowel the light to more of a focussed light source, as opposed to a omni bounce attachment which gives a less direct light.
Master classes at no costs! 😉