"Yes, a loss," Frodo figures the best way might be to simply show him, so he sets that butter on the table and goes to drag one of the chairs nearer to the cabinets.

"The castle won't let me reach for things, you see," he climbs onto the chair first without much trouble, stopping to show Bilbo exactly how the loss works. But when he turns about and goes to reach for something, a can of sugar, suddenly it is as if his foot slips on something unseen and-- whoops, there goes Frodo in a laughing heap on the floor. "There."