PROF DE KOKER
The evidence was quite clear on this point
"There was a sign that I must throw this grenade and he laid down at the same time, so when I threw it I was weak"
So this person to whom you refer cannot be yourself.  According to your statement there was a signal first, the person fell down:
"So when I threw it I was weak"
Only then did you throw it - you couldn't have referred to yourself there.