system
A chat on subreddit /r/me_irl
human
I agree with 12. It’s a musical pattern in 4/4. Four chuggas per bar, then four bars total with the last being the Choo Choo. 

Chugga-chugga-chugga-chugga

Chugga-chugga-chugga-chugga

Chugga-chugga-chugga-chugga

Choo Choo!
gpt
This is the most detailed analysis- it’s crazy how we all have different perspectives. I’m going to find my coolest trains VHS and get back to everyone. (Part of the monster truck tv ads family of VHS tapes)