As Zhuge Liang rushed out to chasing after Yue Ying, he left the stuff there, and never came back. About 40 minutes later, Wei Yan passed by them. He backed up and was wondering what they were. (If you forgot or didn't read chapter 2, it was the puddle, sponge, and bucket of water). He smelled everything and didn't find anything wrong with them.
He took the sponge, looked at it and pondered. Then, he took a small bite out of it. After swallowing it, he thought it was delicious, so he ate the whole thing. He had no problem chewing the thing. Wei Yan couldn't swallow the big chunk, so he took the bucket of water and drank it. He was literally choking, but he came to swallowing the sponge.
Just after, he burped out a smell of sponge. Ew. After wiping his mouth, he looked at the floor. It was the puddle, but he didn't know that. Yan had forgotten that he ever saw that and thought that he spilled the water. Knowing that he might get in trouble, he kneeled down and drank it. The floor was now puddle-free. Afterward, he was satisfied and was about to leave until his stomach started to grumble. Wei Yan, the beast of Shu threw up on the floor! It was just water and chunks of the sponge.
After pouring out all he had eaten, he started to feel dizzy, so he went to find Zhuge Liang to help him out, leaving his leftovers there on the floor…
I know it's short but I had to have Wei Yan do something crazy….
Also...if you still remember, the bathroom was right next to him…he could have just ran in there…but I guess he's too stupid…no offense to those Wei Yan lovers.