I recently received my prowler in the mail and have only done challenge 1 once: 6-40 yard sprints weighted with 140 lbs with a 60 sec rest between each set and alternating high and low handles. I didn't have the ability to film it because I was by myself, but I plan on doing so next time and sending it to elitefts (upon their request via Twitter). I felt pretty strong, and completed it, though I definitely felt the flu, but this was a couple days ago, so I was doing it sans glycogen.
I currently a, 6'3" at 219 lbs down from 228 pre prep phase. I didn't measure body fat %, but I'd guess I'm about 15% (I can sort of see my abs).
I raw dead 535, squat 520 w/ an overhead log pushpress of 255 and can load a 365 atlas stone.
On events days I usually finish with a medley something like this:
150 lb sandbag fireman carry lunges for 50'-flip 630lbs tire 5 times afap- then 20 alternating strikes with a 12 lbs sledge hammer for 3 rounds with a 45 sec rest between rounds.