Snape couldn't not grimace at that: the memory of Ginny's outbursts over dinner was still fresh.
But luckily he had another alibi ready to hand. "I know all about the Potter/Weasley temper," he grumbled. "James and I got off to quite a rocky start."
"I'll be relieved to have the students off the premises." And away from the danger of Death Eater returnees, he most certainly didn't say aloud.