Watch that drive way in gas stations as well. What may just LOOK wet like water can EASILY be spilled diesel, kerosene or oil. They are all slick enough to dump you.When you're filling your bike at a gas station and decide there is room for one more little splash in the tank, you are always wrong. The next step is running for the paper towels to clean up the mess.
EVEN if it is water, when diesel gets spilled, all they do is "spray/wash" water on it. Disguising it and making it even more slick.
I watched my wife drop hers like a peg leg goat on ice the very first time we put gas in it. I never thought a thing about that big wet spot on the other side of the pumps until she rolled in to it. Plop. Walked over there to help and yep, half diesel.