Best animated short film?

The best short films I've ever seen in my life are on Netflix.

Zima Blue
Sonnie's Edge
Beyond The Aquila Rift

I really can't find any words to describe how great I found these films. Although they are only about 10 minutes long…

Because I was so positively surprised by these short films, I just wanted to ask if you know very good animated short films?

I'm happy about every recommendation!

Piper (from Pixar)
In a heartbeat (on Youtube)

I generally like the Pixar shorts, otherwise I hardly watch short films.

Dante's Inferno - An Animated Epic

Everything is from Love, Death & Robots.

I like Kigeki and Mr. Hublot.

Dear Kobe Bryant Basketball got n Oscar for best animated short, but it didn't last me 2 minutes.