By Internet standards, a perfectly timed photo occurs when two of the following three conditions are met:
1. Perfect Place
2. Perfect Time
3. Perfect Angle
Sometimes the holy trinity of perfectness is achieved and you get an Internet classic like so many of the photographs below. There are countless galleries of these images floating around. I tried my best to compile the most representative of this concept. If you're craving more, the following links are a good start: r/PerfectTiming on Reddit; Bored Panda ( here, here and here); BuzzFeed ( here and here)
Enjoy!