You can make your hay-maker into a very small circle.
In the following spear circle clip, you will find that in order for your straight line attack spear (like a jab) to be able to stab at your opponent's chest, your spear has to pass his
- spear head,
- front part of the spear,
- middle part of the spear, and the
- back part of the spear.
In other words, when your opponent uses hay-maker to block your jab, he is not using just 1 contact point. he is using his entire arm instead.
In stead of calling it hay-maker, I prefer to call it "spear strategy".