Check out your clean stall speeds. Typically very close to your flaps 15, V2+15 initial climb speed.
You can takeoff with a clean wing, do a slightly slower rotation, think "accelerate" instead of "climb" and it's a fairly benign event.
Pull back (increase angle of attack) or fly out of ground effect to soon and it loses it's benigness very quickly.
Accomplished several times in the sim during the 'anything you want to do?' phase.