Elbows flare on the dead stop drive
Without a stretch reflex the elbows flare to recruit the pec.
Overactive muscles
Pec majorAnterior deltoid
Corrective work
Foam RollPectorals↗StretchDoorway pec stretch↗Without a stretch reflex the elbows flare to recruit the pec.
Using the pin contact as a bounce defeats the dead-stop purpose.