Have I got this right? You are not a flight instructor. (If you are,
please correct me.) Despite this, you hand over the controls to a
stranger. To a stranger nonetheless who sits the first time in his life
in a small plane. And you don't just hand over the controls at altitude
(which admittedly I have done myself), but right on the ground and you
let him fly the take off. Then you let him fly a 180 at low altitude.
And all this *with a passenger in the back*!

Yes, you screwed up royally. But for a different reason than you think.

Stefan