Sherlock jumping in front of cars (and one time a bus)
The bus-jumping. You notice how Sherlock is fidgeting? Because he and John have just jumped front of a bus. But John is not fidgeting. He has his feet squarely planted. Because Sherlock just asked him to jump in front of a bus. John is like, “Fuck yes, this is insane but if Sherlock says his plan needs me in front of a bus, then I will commit.”