That plexiglass is alot tougher than you think..even the non-bulletproof
stuff.  In the Phantom, they had a special tool to shatter the canopy for
emergencies. 
      The only thing shattering if you hit the canopy with your fist would be 
your fist 

 .   Oh yeah, the crosshairs are projected on a gunsight, not the
canopy...so I guess you'd have to break that too 
