Over the back Question? Sorry mistyped my first question

[CoaachJF]

Went to a Class L Girls Basketball game last night and sat behind the scores table. Class L is the largest division in my state. In the second quarter a foul is called and when the official goes to report the foul he says #5 blue over the back and makes a motion like he is going to climb a ladder with his hands. I thought that there was no such thing as over the back, it would be called a push. Just wondering if someone could explain the ruling to me please.

Thanks