Originally Posted by Frank Grimes

Just because it hasn't happened to you, doesn't mean it doesn't happen.

I've had it multiple times when it's smooth up front, and yes it was literally not a burble.

And when you ask for an explanation, they will say something like "the carts are almost falling over back here". The "it's rougher in the back than the front" is the explanation you get, what would you do after they say that? Are you going to tell them that it's smooth and they don't know what they are talking about?