Luke tapped the ground twice with the metal pipe and said, "Everybody, go home early today. Didn't you hear this guy say that they've put a ton of explosives in the mall? You'll die if you keep running around."
Everybody looked at each other in bewilderment.
A few seconds later, a middle-aged man who was dressed similar to Luke strode out and bowed deeply. "Thank you, sir. You saved me twice. How should I address you?"
Luke waved the metal pipe. "I'm just an ordinary laborer."
Stumped for a moment, the middle-aged man bowed again. "My apologies – you do need to protect your identity. Thank you again, sir."
With that, he strode out.
He could only speak like this because Luke was dressed like him, which gave him a sense of familiarity.
If it were Batman, the middle-aged man would be afraid of getting close and dirtying the bigshot's armor.