It worked. Dean would take the time to revel in that later. For now he was still moving, barely dodging a stunning spell that despite her reduced functionality came all too close. Dean reached with his left hand and grabbed the nearest thing he could: a lamp.
Half-straddling the witch now, Dean lifted the lamp and brought it down hard, striking her head. The angle was sharp and while his left arm was clumsy, the force behind it was heavy. He had an advantage now and he was going to take it.