Answer:
The narrator wakes up from his sleep in "An Uncomfortable Bed" when he feels a heavy body fall on him and a hot liquid poured on his chest. It turns out to be a valet (or servant) bringing the narrator his tea. Because the mattress is in the middle of the floor, the valet trips, causing him to fall and spill the hot beverage.
The narrator took all the precautions he could think of to avoid being the victim of a practical joke, but in the end, he created the very situation he was trying to avoid.
Step-by-step explanation: