When someone yells at you or asks you a question you are not ready for, it is easy to become flustered. When this happens try the slow glass spell. The idea comes from a sicence fiction novel about a kind of glass that allows light to pass through only very slowly. An image entering one side would not be seen on the other untill many minitues, or even years have passed.
Imagine a thick plate of slow glass between you and the other party. Time moves normally on thier side but the glass makes it move slowly on your side. The other person's words and actions come through at a snails paceso impatience, thoughlessness, harshness and so on hardly pass through at all.
You have all the time in the world to respond.