Milliways' Plague of Amphibians is now over thanks to a Weasley twin. Following the smell, George goes to Indy and Mike's suite and removes the swamp, then goes downstairs and to the bar for a drink, where he obtains the picture Indy has left of the whole prank, where the bar is holding it for him, which makes him laugh 'til tears ran down his cheeks. This one is definitely going up on their Wall o' Tomfoolery.
Before using a potion to go home, George stands on table and calls out, "Attention please! If any of you were impressed by today's particularly spectacular exhibition of joke products, visit Weasley's Wizarding Wheezes, 93 Diagon Alley, London, Wizarding Britain, a fine joking establishment, for all your pranking needs! Or use one of the handy order forms lying around the bar and order with the bar owls--shipping is fantastically cheap."
He gets down, remembers something, and get back up on the table again.
He added, "And please do pay careful attention to the instructions for
removal."
Well, actually George and Fred both find it more interesting when their pranks aren't removed, but he does want to save Fred and his skins and pass the blame onto the person who ignored said removal instructions--mind you, without saying Indy's name. That was bad business.
Still smirking to himself, he takes out a potion, throws it down, and disappears, back to the shop. It should be noted that today's potion gave up green smoke, and made a sound that maybe, might have perhaps sounded like a croak. Or maybe you were just imagining it.