If this is your favorite rapid on the run, you're not alone.  Kirshbaum is 1/4 mile of IV+ rapids linked together making for a super fun ride that puts Disneyland to shame.  If you could stretch this rapid out for 6 miles, it would be an international classic.  All lines go, pick your favorite.  Be careful of an undercut rock on the river left bank in the last 1/4 of the rapid.  There have been a couple close calls here.