The main problem I have here is simply the exaggeration of Ash's and Misty's flaws. Yes, Ash is dense, but here he's yawning in something similar to an interrogation room. Plus, he's not responding (until the very end, at least) to Misty's own multiplied anger and determination. The setting also creates a question, but that's something that could be explained. These things may have made it more funny, but from a writer's standpoint, they didn't exactly fit the given scenario of the characters, either.