Bench press form. Stan Efferding has a quirky way to bench press.

Notice how these world class powerlifters
are looking at the bar as it goes down, and when it hits their chests they slam their heads into the bench.

I'm guessing the reason for this is that
it's accentuating the arch in their chest and  lower  back  and it's helping them gain momentum to clear the bar off  their chest when they slam the  back of their heads onto
the bench.  Give it a try.