[This story contains major spoilers for Spider-Man: Brand New Day.] With their concluding dap in Spider-Man: Brand New Day, Jacob Batalon and Tom Holland have joined Predator’s Arnold Schwarzenegger and Carl Weathers in the pantheon of cinema’s most iconic handshakes. Batalon’s Ned Leeds and Holland’s Peter Parker might be at the very top of the list when one considers the narrative and emotional significance behind the trademark gesture they’ve been giving each other since their best friendship debuted in 2017’s Spider-Man: Homecoming. However, the exact meaning behind this particular exchange has already been hotly debated by the…