very few track hits below 30hz
they may be Bass test tracks
thats really cool , windshield effect thats awesome
I love 2 thing on Bass
its should be very loud , to pop out ears ( easy to make loud on Upper bass , very difficult to make it on LOW deep bass )
its should be very loud , to show some impact on car body ( wind shield , seats , dashboard )
i dont know how much it is difficult to start hair trick
in combination of both , it must be enough , to make a person feels very hard to breathe