YES!
There is a point of hysteria where you can not get a caller back from it. Sometimes we push these callers over the edge. Sometimes they have passed it before they call.
Belive it or not, people lie. Age and wisdom, help dispatchers uncover those lies sometimes, but, it also leads to jaded dispatchers.
If anyone is near Indy for a day, hit me up, I'll let you come tether into me for 8 hours. You can get a feel of what I do.