"It's not funny, Sentinel."

"You fell for it!" Sentinel gasped. "You of all bots!"

Optimus glared. He wiped off the paint threatening to drip into his optics. "We're academy cadets now. We should be above this."

"Lighten up, Optimus." Sentinel slapped an arm around Optimus' shoulder and snapped a photo. "No one saw."

Optimus shrugged off Sentinel's arm. "So help me, if I can't clean this off..."

"Ease up, I'll help."

"And you'll delete the picture?"

"Eh… let's say I will." Sentinel laughed again.

Optimus couldn't help but smile. Mainly because Sentinel had covered his mouth with a paint-coated hand.