They both have their trunks in the front.
Well, mostly to forget.....
So they can stamp out fires. Why do elephants have flat feet? So they can stamp out flaming ducks.
Easy. Lock them both in a trunk and watch who will be happier to see you after you open it in 15 minutes.
With a blue elephant gun. You hold his trunk until he turns blue, then you shoot him with the blue elephant gun Edit: My 5 year old nephew loves this joke.