Does anybody remember "Tom Swifties?" These little one-liners were popular, along with elephant jokes and Spoonerisms, back when I was in junior high school. It shouldn't be necessary to explain how they work -- just take a look at these examples from Harry Potter's universe:
"I'm over here, Hermione, under the invisibility cloak," whispered Harry, transparently.
"Meow!" said Cruikshanks, catagorically.
"Do you like my new dress robes?" asked Fleur, figuratively.
"You must put the lacewings in *before* the axolotl, Longbottom!" Snape said explosively.
"Avada, uh... how does that go again?" said Goyle, cursorily.
"I've lost my finger!" cried Pettigrew, pointlessly. (with apologies to Elizabeth Shaffer)
"Allow me to introduce myself; I am Madam Maxime," she said, broadly.
"Want to play a game of chess?" asked Ron, ponderously ("pawnderously").
"Welcome to the Knight Bus," said Stan, conductively.
"Oh, no! I've forgotten my colour-coded revisions!" said Hermione, listlessly.
"That @#$%! poltergeist!" Filch swore, peevishly.
"Mine was sixteen inches, solid oak," stated Hagrid, erectly.
"Someone's stolen all the games from the Common Room," cried Fred and George, Cluelessly.
"You must breathe in the medicated vapours as deeply as possible," said Madam Pomfrey, inspirationally.
"Please concentrate all your attention on this pocket watch..." Professor Trelawney intoned, hypnotically.
"Welcome to my humble stall," said Myrtle, commodiously.