The real lyrics:
I thought I heard rejoicing in heaven over me

But I misheard them as:
Thora Hird rejoicing in heaven over me

The embarrassing moment of revelation:
I can't remember - reading the inlay?

Age when I realized how wrong I had been:
19?

Misheard by:
James Ots

I think my version is better than the original: yes
I have managed to convince others that my version is correct: yes