Say you're standing in front of a locked door. Now imagine you try to open the door.
I can't summon water buffalo either, but I imagine one can knock down a door. Although I'm reminded of the Mythbusters where they tested 'bull in a china shop'; the bull avoided the shelves.
Maybe it'd be cool to have four different messages for each hero type?
"You summon a woodland critter to Break down the door. After a brief pause, a brave and bold squirrel answers the call. Something tells you this isn't going to work."
"You try to focus your telekinesis to pick the lock... You're able to lift a couple of the tumblers to their open positions, but you're a hero, not a burglar, and the unfamiliar mechanism proves too much for you."
"You sift through your pockets, sure that you have some tool that you could use to take the door's hinges apart. Then it occurs to you to actually look for the hinges... They must be on the other side. Of course."
"You're a Elemental. Something something something. I could burn the whole building down. Stapler."