In this issue the X-men have lost a number of their Team.
Only Psylocke can lead them this time. As they arrive on the scene of the invasion, She is the first X-man to fall, even before the fighting begins. Overwhelmed by Psychic noise, she is surprise attacked from the rear.
The villain quickly stuns her unconscious a few moments.
Amazingly not more than 3 pages later, she is AGAIN, knocked unconscious and hung from a mast.
Psylocke was not the strongest X-man physically at this point in time, and spent alot of adventures unconscious or in various states of peril.

Source: cbr