Ahh, that point on the downwind when you finally have a moment to look across and realise that there is nobody there, nobody moaning at you for being 20ft high and that you are going to have to land this thing yourself... I remember it well. As do most pilots.
Personally I sang "I'm forever blowing bubbles" all the way around my first solo (pre Michael Jackson connotations!) and daringly waggled the wings on downwind.
I too solo'd at 16 and its a fair feeling knowing you can fly a plane before you can drive a car...
Well done my son.
WWW