Leo sighed. It wasn't like him to storm out of the lair like that, he was acting like Raph. 

He'd just needed some time to himself, running over rooftops, pushing himself until he ended up slumping against the rooftop entrance to the apartment block, panting and struggling to catch his breath. 

It had helped take his mind off his stress from earlier. As the leader he needed to make every decision carefully. If they won then it was because of their teamwork, but when they lost it always felt like his fault for not being a good enough leader.