I wonder who will get tired first...

"Dad, can your computer guess 'heads' or 'tails' when I flip this coin?"

"Sure, give me a second"

#!/bin/sh  
voice=Zarvox  
coin=$RANDOM  
let "coin %= 2"  
if [ "$coin" -eq 0 ]  
then  
  say -v $voice heads  
else  
  say -v $voice tails  
fi

I haven't seen my Mac since.