During a fight with Mad Mod, you both got zapped. Instead of getting turned into old people, you aged down…10 years. The effects are temporary, of course. You just need to wait for the others to find Mods staff and break it. Until then…

“Oh, c’mon! This is great!” Beast Boy squealed, jumping onto the couch while smiling. “I’m six again! And I still have my powers! This is awesome!”

He patted next to him, grinning a toothy grin. “Stop sulking and sit down!”