i'm pretty good at kicking bagpipes,
unlike what David says you can't adjust your speed, it will get faster each time,
just follow the bagpipe line, don't stray away from the path
As for the SOL
stay close to the Zombies, stay on the left, there seems to be more Zombies on the left. move around and stay like real close them, they're real easy to hit up close, just remember it will take a lot of work for SOL, took me a looong time
but for Bagpipe, it's easy
i wish you the best of luck