bow with diabowlo
like Robin Hood.
First of all, take both sticks in your left hand so that the string-ends are towards the outside.
Then, throw up diabolo so that it lands on both strings to the right and throw then high.
Put sticks in the vertical on your left and tighten the string to make a "bow". Tip up lightly the stick which is towards you above so that diabolo falls again on the lower string.
As soon as diabolo falls again, drop the string and they will think that you have catch diabolo as with an bow.