4600kv motor getting very hot

[Henry8601]

I finally got a chance to connect up my 4600kv system today. I am running a 8000mah 3s2p pack. This is the first time I have ever run the motor and it was not connected to anything. I adjusted the settings for the Lipo cut off and that was all, I then programmed it with the receiver as per the instructions. I then tried a few blips of throttle and the then some brief WOT holds. I did this for 20 seconds and then the motor was almost too hot to touch! It had got really hot really quickly, but the esc was still totally cool. Am I doing anything wrong or is this normal? I am just really surprised that it got so hot so quickly