How much evidence do you need?

Recently I was rung by a friend who was heavily intoxicated. I answered the phone and before I had time to say “hello” my friend shot his challenge down the line.
“You have one chance to prove to me there is a God”
At times like this I freeze up and never know what to say however whenever I’m challenged like this the answers always come to me.
I replied “Sit down take off your shoe and your sock, look at your foot, move it around bend your toes and look at all the detail in it, then try to tell me there is no creator”