The importance of version control. Had a school project at a real company and i didn't understand it so i said fuck it. Then someone asked me to alter the js library a little and push/pull that to the server. I thought fuck it, altered it and accidentally pressed save (automatic ftp upload). Suddenly the file was overwritten (that guy worked on it for 6 fucking hours) and it went from like a thousand lines to just a few. We did restore it from the browser. He said: either you're going to use git or you're out.

Then i started using git.