Kellen and Casper ran into his Dad and Charlie when they were heading to dinner at the end of the day. Casper had hung around, doing his work from his tablet as he also sat in on Kellen's training session with his students. Kellen and Casper had realised it had been a long time, if he had ever sat in and watched his students train.
The two of them could tell that they were nervous, stealing glances at Casper as he sat there, all prim and proper in a folding chair at a fold out table, his phone ringing occasionally if someone needed something from him. Kellen knew he had probably made notes on the training session as well.