Disclaimer: This is only what I think Nico's dream is. PJO and HoO both belong to Uncle Rick. Radioactive is owned by Imagine Dragons.
Warning: There is randomness and burning popcorn. Read at your own risk.
The sky was black. That is what Nico saw. Not night black, like paint black. The sun was like a little kid drawing, and Nico was standing in a corn field.
"Nico, I love you!" Nico turned around, and the there was Percy running towards him. Nico widened his eyes in horror, and Leo jumped in between Nico and Percy.
"Not on my watch." Leo set his hands on fire, and Percy turned to popcorn. Then all Hades ran loose. All the corn popped around him and Leo turned to popcorn to, starting at his feet, until only his hands, which were on fire, were left. They ran loose.
Nico saw some popcorn that turned into a thousand snakes, wrapped around Nico, choking Nico, then the snakes turned into popcorn. The pop corn was up to Nico's calves.
Leo's right hand was terrorizing a corn plant next to Nico. "Sharkeisha, nooooo!" yelled the corn plant. The corn was up to Nico's knees.
Bunches on poison cows were munching on popcorn. Frank was on one of them, waving a lasso, yelling cowboy terms that no cowboy has ever said. Mars was picking up a bunch on popcorn and chewing, mouth open. Frank was killing the cows and scooping the dust into Hazel's soul. Then Mars screamed and started firing missiles everywhere, then turned into his immortal form, and Frank, Hazel, and the cows disappeared. The popcorn was up to Nico's hips.
Suddenly, Argo the second appeared in the sky. It blasted Radioactive from speakers and shooting popcorn every where. Coach Hedge jumped from the deck and landed in a pile of popcorn. He started hitting the popcorn with his baseball bat. The popcorn was up to Nico's waist.
Nico couldn't move. He watched as Jason soared through the sky Superman style with Piper on his back and turning to popcorn. The corn plants were screaming piteously for there lives; the Argo now shooting butter and salt; Reyna, Bianca, and Tristan McLean turning into popcorn. The individual pieces of popcorn were talking in the chipmunk voices. Gaea's voice was whispering into the mind of Nico, trying to turn him to her side. The popcorn was up to Nico's neck.
"Save us!" The now earless corn plants screamed was Leo's hands burned them to a crisp. The little kid sun drawing was turning in to burning pieces of popcorn, falling on the plain of popcorn and setting it on fire. Someone was laughing in a maniacal way, echoing through the sky.
Nico wanted to scream, as the fire got closer, and closer, and Annabeth popped out. Annabeth slapped Nico.
"You stole my boyfriend," she yelled. The slap really stung. Annabeth kicked popcorn into Nico's face, and then he was looking at Hazel, Frank and denim guy.
"I-I had the weirdest nightmare about popcorn." Nico said as he brushed off corn silk.