ABSA Cargo 767 Takeoff Cancelled - Takeoff Configuration Issue? 

Awesome, how did you know it was a takeoff configuration warning?

Nice video really cool

Great video! Interesting to see what went on. In my opinion, could've been a bird strike prior to entering the runway, and the crew were checking the engines at high power to see if there was any problem. Only other thing I can think of is oil pressure or temperature issues.

If you have two engines and one of them isn't "quite" right, ya go back to the ramp. Unusual, but very interesting.