OKAY I HAD A GREAT IDEA.
Percy and Jason both go to do the bro thing where they smack you on the back, like they go up to Nico. But as they smack him on his back Nico just says "bye bitch" and shadow travels away so the end up smacking air and they just look at each other with panic like 'omg we just vaporized Nico'. At which point they see Will coming around the corner and try to awkwardly explain that they had just vaporized Nico on accident. And of course then Nico dramatically steps out from behind a tree like "guys I literally just shadow travelled..." and then Percy and Jason feel stupid for forgetting that Nico could do that. But of course lovely Will Solace is like "NICO what have I said about shadow traveling?" and then Nico gets scared and tries to hide behind Percy and Jason as Will aggressively tries to make sure his little lord of darkness is okay.