SendMessageUpwards can't send more information?

i am able to send a simple integer but when i try to send an integer and a transform it doesn't work.

WORKS

hit.collider.SendMessageUpwards("applyDamage", damage, SendMessageOptions.DontRequireReceiver);

DOESN'T WORK

hit.collider.SendMessageUpwards("applyDamage", damage, transform.root.transform, SendMessageOptions.DontRequireReceiver);

Per the documentation you can only pass a single argument (of any type). The easy workaround is to put your argument into an Array

var argArray : Array = new Array ();
argArray.Add (damage);
argArray.Add (transform.root.transform);
hit.collider.SendMessageUpwards("applyDamage", argArray, SendMessageOptions.DontRequireReceiver);

And then, obviously, the receiver is responsible for taking an Array argument and parsing it correctly.