Been developing a Java app for 3 months, including basically everything from aop to rest services.

Meeting with po:
Me: So, guess how many loc I wrote.
Po: 400?
Me: *laughs* I'll get to 10.000 this week.

MAN COMES IN WITH CHANGING REQUIREMENTS ON AN HOURLY BASIS YET STILL DOESNT UNDERSTAND HOW MUCH WORK ALL THIS SHIT IS!!

This is the problem in our job, non tech ppl will think it's just a cut and paste or few lines and done.
Even devs when they are not aware of a certain language they do the same, I once had a Project Manager who happened to be a web dev, when explain UI changes to me he always used to talk as if web standards can be applied to native mobile apps

You need to handle this in cold blood, and if asked why so late, just throw them your git history as a proof