system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do rockets look like they're going so slow?

The speed needed to beat gravity is so fast but when you watch a rocket launch the rockets look like they're going so slow.
gpt
an object going 100 mph, 20 feet away crosses your entire  field of vision in a few fractions of a second.   this makes you think "wow, that was fast". 

a rocket, going 11,200 km/h ..  (escape velocity), several dozen miles away, doesn't appear to be moving that quickly, because it's moving a much much smaller fraction of your field of view. 

it only appears to be going slowly because you can only watch it launch from miles away.   if you were stood next to it, you'd be thinking "wow, that's fast".   (presumably right before you though "wow, that's noisey" and "why am i on fire")