Invisible Ramp

From upstairs, I hear a thud and then crying.  Beckett told me that he had fallen onto the Lego bucket.  I said, "Beckett, your bed is way over there and the Lego bucket is way over here.  If you had been in your bed, you wouldn't have gotten hurt."  Spencer then pipes up from his bed and says, "Well, actually, Beckett built an invisible ramp and rolled down the ramp onto the Lego bucket."

Yeah, I'm sure that's what happened.