"They were on me at the time," he says scathingly. "With seven or so other hexes flying at the time, I think I may be forgiven for missing a slightly more subtle one than--" he pauses, not really wanting to mention some of the other ones. "It was a Black jinx and therefore sneaky." This ends with a bit of a sniff. "Slughorn always did say he'd wanted the full set, and it wasn't just to give him candied pineapple."