A dull morning.

“Good morning,” I greeted the customer as he entered the store.
“Wow, you certainly sound excited,” the customer replied.
“Sorry,” I apologized. “It’s been a dull morning.”
“Dull morning, huh? I’ll be right back,” the customer said as he left the store.
A few minutes later, a hideous looking, green-faced demon came charging in and ran up to me with a loud shriek.
“Waugh!” I yelped.
Chuckling, the customer removed his mask and said, “Not a dull morning now, is it!”