Hey Pandas, As A Developer Or A Programmer, What Are The Things That Annoy You The Most?

Telling your manager how long it's going to take and they tell the client half of the estimated time. Then tell you the client is disappointed because it really did take the amount of time originally estimated.

"Hacking" scenes in movies... such BS

Syntax errors...

My code not working because I made a spelling error or had an extra semi-colon somewhere.