You just can't take a good hit. When receiving a successful blow from an opponent that is intended to move you down the Knockout Track, you skip the first step and start by receiving a −4 instead of the usual −2. Therefore, you pass out much quicker.
You can take this Fault up to four times, each time starting at a lower level on the Knockout Track. If you take this Fault twice, you start at −6. If you take this Fault three times, you start at −8. For four times, you simply collapse with a good sock to the jaw.