Alastor messed up
He was good. Top of his year in stealth and tracking, defence, undercover ops and detection. Only beaten into second in suspect identification because he was too ready to suspect the innocent. Better that than the opposite mistake.
The other newbies joked that Moody had eyes in his backside. Even some of the old-timers were impressed. It took a lot to catch him out.
But it only takes once. One second's inattention, and he was lying on his back cursing and swearing, half his leg missing and his face feeling as if it was on fire. Alastor had messed up.