If there are less than twelve players then it is possible to get a Mushroom in first place.
I probably dodge more POW Blocks than I get hit by, I usually find a bump or something to get off the ground before it hits. Lightning is a dust ball though, it strikes with no waning so you can't even use your item before you lose it. Even still, if I find myself in first place with a Mushroom, more often than not it will be used to dodge a blue shell.
Oh, and Vudu, you should add a comma to your last post. It sounds like you are calling Mop it up stupid. Unless you did mean to call Mop it up stupid, in which case I say you are mean.
Check back a page or two into the Mario Kart Wii topic and you'll find out the story behind that. Apparently, "Stupid Mop" is another name for the song "Hey Foxymophandlemama, That's Me" which someone had said they're going to refer to me as. Vudu hates me because I've never heard of some obscure music group called Pearl Jam.