"So use more than one person and stand behind a wall."
"Ah. Right then." Nod. "That should look completely normal."
"Pardon?"
"Excuse us," Rus says to Alf. He takes Severus' elbow and pulls him to one side, activating the silencing charm again. "Gently now Severus." Rus isn't smiling. "Listen to me. This is what we'll do. I'll keep up hitting the targets and you keep missing. We'll get him and all his buddies to bet on me, then when the time comes, I'll miss every throw and you'll hit every throw. We'll bet the opposite and take all the winnings. We'll clean up, all his mates will be furious and you can change all his liquor to cod liver oil and soap. Sound all right?" he asks anxiously.