EBarnacle here--I love the linked ads on the bottom: Crash test Accelerometers and buy a training dummy--how apropos.

In the first second of fall at 32f/s/s, the faller [if there is no other influence] falls 16 feet, in the second, 48 feet; in the 3rd, 80 feet... until he reaches terminal velocity. Bear in mind that 88 ft per second is 60 mph. Also bear in mind, it's the landing, not the falling that kills.