Well...
Usually when anyone sits down they are at a lower level than the waiters...
I guess if you was actually smart youd figure that out...
Even so, that "anyone" should not be so low that his/her waiter had to "squat" in order to touch his/her shoulders unless he/she is Oompa Loompa short.
Here's a picture of what a waiter standing next to a customer sitting down dining height comparison typically looks like:
And this is the picture I got from your descriptions of you and your waiter in your Oompa Loompa scenario and the kid is not even sitting...
: