I'm sorry. *offers tea* The same thing happened to me just a few weeks ago. My thirteen-year-old dog, Coco, died of kidney disease. We knew it would happen, but it was still a bit hard to deal with.
No you don't, first of all you don't get your knees up worth anything (that whole roll-step IS NOT faster, you just think it is because you're taking more steps, which makes ANYTHING faster). Second of all, your percussion stands with Marimbas. How is that marching? And do you even care about the yard lines?