Yesterday I learned Poppy's E can miss.
Doesn't properly follow movement abilities like Alistar's headbutt. Not sure if intended or not, and it's definitely something that'd take ridiculous reflexes to plan for. But, just felt like sharing in case others didn't know.
Proof: (Weird audio for some reason, not sure why. Not important though.) https://www.youtube.com/watch?v=06h2xpHQsHA