“Aw, Ronniekins, it’s just a shirt!” the twins said.

“Take it off!”

“It’s not real! It’s a muggle shirt!”

“Don‘t care! Help, Harry!”

Harry walked in and saw Ron cowering in the corner and the twins standing in front of him.

“What’s going on?”

The twins turned around and showed Harry. “Dunno. They’re muggle Halloween shirts. Nothing wrong with them.”

Harry said, “I can see why he wouldn’t like yours, George.”

“I’m Fred.”

“Right. Well, I agree with Ron.”

So, Fred went out the next day and exchanged his shirt with the embroidered spider for a ‘Boo!’ shirt like George’s.