This is a great discussion on Andor. I upvoted a bunch of the comments and added a few of my own.

The question is: What is the smallest moment, lasting 3 seconds or less, that convinced you that the show was operating on another level?

https://www.reddit.com/r/andor/comments/1rs00be/whats_the_smallest_moment_in_andor_that_convinced/

#StarWarsAndor

@jeawhiz As clichéd as it may seem, my defining moment were the actual last 3 seconds of season 1 - when I fully realized what the inmates actually manufactured at Narkina 5. A feeling of utter existential dread and smallness. And a most definitive level-up of the series according to yours truly's most humble opinion.
@wasszmut I watched that scene on repeat many times. It's a fantastic construction site; as an engineer, getting to observe all the parts forming together to compose the weapon's lens is a treat. How small the part the prisoners were making!
@jeawhiz A truly well-executed scene. And a big irony bonus when you think that Cassian participated to this terrible weapon's construction, however small his contribution was.
@wasszmut Also loved the bot soldering tying back to that episode's opening scene of Wilmon soldering wires for a bomb.