Assuming you are only halting once, I’d hand-keyframe it. You can use this modified expression – it will respect all hand animation and still follow your head.
head=thisComp.layer(“Head”);
delay=0.1; // delay in seconds
offset_X=100; //offset from head in pixels
offset_Y=100;
X=position[0]+head.position.valueAtTime(time-delay)[0]+offset_X;
Y=position[1]+head.position.valueAtTime(time-delay)[1]+offset_Y;
[X,Y]
Mylenium
[Pour Myl