Uncontrollable climb / stall

[cratwood 0]

Prior to takeoff I have the trim set to 3.  During the takeoff roll, prior to V-1, the aircraft begins a climb and I get a stall warning.  I push the yolk forward and try to adjust the trim but the aircraft just keeps climbing and I am unable to control the aircraft.  What am I doing wrong?  

Edited April 5, 2021 by cratwood
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[Maaarp 10]

I had similar issues and found that I hadn't advanced the Condition Levers to Max prior to take off. Ooops!