A question about future perfect subjunctive
The other day I was watching F1 racing videos, racing driver Kimi Raikkonon shouted on team radio "I will crash into him if I would have gone straight!"
I am confused. Is that correct to use "I will" there at the start of that sentence to express a possible result of a subjunctive cause?
I've looked it up to all the grammar books I have. No answer found.
Then the other day I was talking to a friend, she used this tense again in a question. I answered with "I will" as Kimi Raikkonon did on his team radio. I am not sure if it is correct.
Anyone here could give me an explanation of it and some examples?