Darin is actually a little surprised. And his face says as much.

"Are...you both sure? I have some ideas for what I think I need but...it's mostly going to be centered around my physical abilities. It's going to be pretty grueling. I need to be put to task. If you really want to do this, I won't stop you but..."

He trails off and considers his options, then nods as he comes to a decision.

"I want you guys to come at me with your best. Don't just put me through my paces...I need you guys to try and break me. If you two are up to the task then..."