Those games are really interesting. In the first two, they are both ladder-breakers played by stronger players; my guess is the weaker players set up the ladders assuming that the stronger players wouldn't play a fifth line shoulder hit to break them, and the stronger player didn't back down. In the third game, the fifth line shoulder hits aren't that surprising; they're reductions against frameworks that were allowed to get big in exchange for growing an opposing framework; they're locally bad moves but the global benefits are clear; you'll note that both players play a fifth line shoulder hit.

The only one I can't parse is the last one. There are a lot of variations where I want to know what black's plan is.