hey good try!
I found out a long time ago that you point helmet lights up so that you aim the light where you're going. I use a helmet light mount to hold my cam and I aim it so it points about 20-30 feet in front of me (which is what you need to do to ride single track fast at night). Figure that you'll be looking sort of down the whole time and aim accordingly.
Part of the problem is that you have a relatively narrow angle lens - maybe 90 degrees. I had the same initially and swapped it out for a 120 degree lens. A wider angle lens will work but I don't know if that's an option.
Don't be afraid of looking around - it's what catches part of the "peloton" atmosphere.
btw that was a nice board. I'll have to show the clip to my bro who is (or was - he's recovering from a broken leg from a bad landing) looking to get a slalom board.
Looking forward to your next cam clip
cdr