I understand where you are coming from, this happened to me, but we both shot at the same time (his super weapon) and you will break apart faster than the boss.
But I just sat there laughing, thinking "oh good, another way this game can SCREW US OVER

"
If it was your first boss fight, then sorry mate, that is just bad luck. But if you got that far, then you shouldn't have to much trouble doing it again.
The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.
Bill Watterson