Error bars notwithstanding, some of those neutrinos arrived at Gran Sasso before they should have done because the went via Rome; simples really.
Takling of bars; here is a bad neutrino joke doing the rounds.
Bartender, "We don't serve your type in here". A muon neutrino walks into a bar.
A momentum-space diagram AKA Feynmann diagram depicting an anti-muon neutrino (bottom right).