"Just My Luck"
The demon exploded into a shower of ichor and guts. Will wiped his blade clean. "Yeuch," he said. "This one of the downsides of being a Shadowhunter." "Will!"
A familiar voice called. "William Herondale, where are you?" Will recognized the voice, but couldn't quite place it. "Who is it?" A dagger flew suddenly through the air, landing inches from his face. "Jem!" Will exclaimed. "It's about time, you idiot! How could you have not known it was me!" said Jem crossly. "Well, blimey, Jem you didn't need to throw a knife at me!" "Oh, let's move on boys. As much as this is all very fascinating, we were supposed to be back at the Institute hours ago." "Tessa!" Will yelled in shock. "How is it that you are a full fledged Shadowhunter, trained to detect even the slightest noise, and yet you have two other people surprise you in the course of a few minutes?" said Jem.
"Well, it's just my luck." said Will.
"Clearly." Tessa responded.
Jem also responded with a cough that sounded a lot like "idiot."
All three laughed and started walking back to the Institute.