Yes, he'd have to do something very uncharacteristic of the position, otherwise it's an entirely appropriate and reasonable reaction, which isn't really what one would characterize a "snap".
You seem to be coming from the point of view (that's my assumption based on our short comments; it maybe something else) that it doesn't meet the literal dictionary meaning so it's not a snap - which I disagree with.
I think that's all to it.
It's disingenuous at best to refer to the response as "snapping".