And do I look like the kind of man that can be intimidated?" barked Uncle Vernon.
"Well..." said Moody, pushing back his bowler hat to reveal his sinisterly revolving eye. Uncle Vernon lept backward in horror and collided painfully with a luggage trolley. "Yes, I'd have to say you do, Dursley.

Constant vigilance!

Someone creeping into his yard in the dead of night? More likely there's a very shell-shocked cat wandering somewhere, covered in potato peelings.

Nothing like a nighttime stroll to give you ideas.

Don't put your wand there, boy! What if it ignited? Better wizards than you have lost buttocks, you know."
"Who d'you know who's lost a buttock?"
"Never you mind...

Are you threatening me, sir?” he said, so loudly that passersby actually turned to stare.
“Yes, I am,” said Mad-Eye, who seemed rather pleased that Uncle Vernon had grasped this fact so quickly.
“And do I look like the kind of man who can be intimidated?” barked Uncle Vernon.
“Well...” said Moody, pushing back his bowler hat to reveal his sinisterly revolving magical eye. Uncle Vernon leapt backward in horror and collided painfully with a luggage trolley. “Yes, I’d have to say you do, Dursley.