Team Fortress 2 has a new sports mode, where two teams run around with a ball trying to score goals. It’s called PASS Time, and “combines TF2’s usual fast-paced bloodsport with the actual fast-paced sports of soccer, hockey and basketball”.
The Scout tries to break through the fourth wall in redditor Karhunperse's Source Filmmaker photoshop, aptly named "4th Wall." It might also be a reference to the thematically similar Saxxy Award-winning short, Animation vs. Animator, mentioned by Karhunperse in the post's comments. Full pic below.