Here is another thing to watch out for... Those little glass flakes like to hide in things like pant cuffs, shoe laces, bottom of shoes, etc.... and they wait until you are back in the house and jump off. Don't know how old you are or if you are married or not, but those little flakes sole purpose in life is to find your other half's bare feet. When that happens, you will have a whole new set of issues to deal with.