Plumbing Prank

“Hi, I’m calling about a plumbing issue at the ALDI in Dayton. We’ve got a problem with one of the sinks in the back room. Every time we turn the faucet on, the drain starts making this really loud gurgling noise. It’s not really backing up, it drains fine, but the noise keeps getting worse. Honestly, it sounds like quacking. Yesterday it was just one quack, but today it’s doing like three or four every time somebody washes their hands. One of the employees also swears they heard it say ‘Al