This cap is from 8x22 "Clip Show".
Click to see the full-sized cap.
The boys taking a call from Crowley out by the Impala.
- Oh, so sleepy right now. You have no idea. Zzzz.....
- Good news though...I finally capped 4x21 "When The Levee Breaks". Took me 2 hours and I started getting sleepy just as I was in the final scenes.