Delayed call on slam

[officialtony]

Well, I think I missed this one and don't know if I should have changed my mind officially or not. I put it to the forum.
An Open tournament.
Two 17 year olds who start the match and wrestle the first 3 minutes banging each other pretty hard. Both are dishing it out and taking it. Hard cross faces, tight waist rides, tough Gables, Etc.
Naturally it finally happens. " A " stands up and " B " locks him tight around the waist and drops him like a bad habit - hard. Neither arm is trapped to the body so " A " could try to brace himself. " A " screams and lets out a big puff of air when he hits the mat. He looks rough around the edges so I stop the match. After I replayed it in my mind three times, I am thinking slam. However, three - maybe four - seconds have passed and the coach from " A " is screaming slam. Here is my question.
Is it too late to call the slam - which at this point I think I have?

I did not call it anyway, but wonder if it would have been appropriate since, in reality, I am sure now it was.

I am looking at this for future situations.

In my mind, this is the toughest call I ever have to make - trying to distinguish slam versus aggressive style of wrestling.