What did you have to run off for? Mock trial?
“Nope. What's the one other thing it would be?”
On Sunday evenings? Trial.
“No trial practice tonight. In general, what's the other reason I'd be gone?”
Um, let me think. Trial?
“Other than trial.”
Sometimes you have this trial thing to do...
“Hint: off campus.”
Tournament?
“It's not mock trial.”
Is it mock trial?
“In other words, the reason I'm gone has nothing to do with mock trial. Stated differently, if you say anything to do with mock trial, you are wrong. To put it in another way, do not say mock trial again.”

This week will be long, exhaustive, annoying, and potentially requiring utilization of my network of spies and assassins.

For the record, you needn't kill B[] in his sleep. At least, on my account. At least, tonight.