Great scenes can be subtle if done correctly. Or maybe iconic actors & actresses sharing the screen for a moment in time.
Or "great" scenes can be because the director just doesn't know what they are trying to achieve in the first place. And then they let their actors do whatever the heck they want. Then they unfortunately print the movie and move on.
Thankfully, we have Youtube channels like Looper that can find all of these remarkably awful and embarrassing scenes and make one video. It saves you time and effort to track all these down in the first place!