- The Twist Ending. It reveals Split is set in the same universe as Unbreakable, with David Dunn showing up, well decided to deal with the threat Kevin poses.
- Even more awesome is just how subtly the scene plays out: Kevin's crimes are now national news and playing in a cafe. A patron is suddenly reminded of Glass' domestic terrorism, and, suddenly, there's David Dunn. The shot focuses on David, simply drinking his coffee. No heroic declarations or one-liners are uttered, but you can feel David's intentions radiating off him through the silent, determined expression he wears. The movie then cuts to black as a quiet piano rendition of the Unbreakable motif plays over the darkness. After all these years, David Dunn has returned. "What a twist" indeed.
- When The Beast comes after Ms. Fletcher, she stabs it. It doesn't work, but it's damn brave.
- Casey shooting The Beast is a moment for both. With her last shells, he hits The Beast... and The Beast rises, absolutely maniacal, and walks the shots off.
- Kudos to James McAvoy: his performance as Kevin and his personalities is amazing to the point that just the facial expressions are enough to guess which personality is in control. The big ones are when he has to cycle through several of his personalities one right after another. It's eventually revealed that one alter, Barry, is being impersonated by the others, and you suddenly catch moment where "Barry" seems to have a slight lisp like Hedwig or adjusting items like the Super OCD Dennis.
- Also kudos to M. Night Shyamalan, as the movie has not only delivered both critical and financial acclaim but some critics also felt that Split was M. Night revisiting his roots by going back to what made him an acclaimed director. Very much a Career Resurrection.
- The movie has grossed almost 31 times its $9 million budget. It ended up the second most profitable movie of 2017 behind another Blumhouse production, Get Out.