In Action Comics #862 (April 2008), the Legion of Substitute Heroes stage a daring raid on the Justice League of Earth’s satellite quarters in the unlikeliest of spacefaring vehicles: a 31st century school bus:
What makes this scene even more hilarious is the position that Stone Boy was frozen in when he entered hibernation mode and crashed through the windshield:
The hand gesture he’s making – known as the two-fingered salute – is considered offensive in the United Kingdom, Ireland, South Africa, New Zealand, and Australia, where it is interpreted as a sign of derision, contempt, or defiance of authority: the equivalent of giving someone the finger. Buffy the Vampire Slayer fans will doubtlessly recognize this as the same gesture that Spike made in the Season 4 episode Hush when Xander Harris accused him of being responsible for his sudden loss of voice, a clip of which managed to sneak its way into the opening credits:
Given that the artist for the Superman and the Legion of Super-Heroes story arc, Gary Frank, is British himself, I think we can safely say that this was done on purpose.