Both in a 500,
Not birdstrikes a bit more severe
One tail rotor blade pitch horn snapped, ac forced landing, rolled over shattering plexiglass with shard entering skull
second customer on finals flew through a set of power lines rolled machine end over end 3 times, again shard of plexiglass into skull.
Both would have been ok with a helmet or polycarbonate windshield, I still get funny looks as I wont get in a helicopter without wearing my lid