My creativity when I lay awake in bed and only have 4 hours of sleep left.

Alright so I have to create an API that communicates with a web interface and three different back end systems. And I think my customer might have thought that I am actually Jesus because they didn't have any docs for their systems and their policy did not allow me to gain access to their internal testing environment (which. Drove. Me. NUTS) and expected me to create this API by pure guesswork basically. After teaching the customer's internal IT guy how to capture requests between the systems I managed to somehow got the prototype working. I am proud and sleepy. ... Mainly sleepy

That moment when you get popcorn ready for a relaxing evening and your boss calls and wants a new prototype application in two days.
Gotta love it