With engine failure at V1 (737-300) and decision made to continue the takeoff run, the interrupted feeling that is evident around 10 degrees body angle is further exacerbated if one engine is inoperative while still on the runway.
The nose down change of trim that is apparent from the original trim setting in Units as part of the before takeoff drill, means the aircraft needs a significantly increased pull force to get to the initial 12-13 degrees body angle
In the simulator it is common to see pilots caught by surprise at the strong pull force needed to lift off. Often the main wheels touch the ground several times before the aircraft starts flying. Judicious use of stabilizer trim is needed to alleviate the stick force once the aircraft is safely clear from the runway surface.