Intentional technical

[Cheryl P]

At a Jr hi game this weekend, a player who was frustrated, pushed another player going for a lay-up from behind. The referee called an intentional technical foul.

Was this correct?

As a ref, I am confused between an intentional foul and an intentional-technical foul. I think I probably would of called it flagrant, if it was violent enough, or just intentional. What makes an intentional foul a technical?

Thanks