If you get, for whatever reason, a big thrust asymmetry at LOW speed, this is the likely result.
ie you are below VMCG and VMCA.
What's going to keep it straight? Not rudder certainly.
Sure, pulling both to idle will save the day- but if you weren't trained for, or expecting it, a low speed asymmetric yaw will ceretainly punt you off the runway.
Of course, most engine failures happen just as one passes V1....
