How do you know if an elephant is angry or a deer is scared?

When a white tailed deer is scared it flicks its tail. When an elephant is scared it puts out its ears.  If it is calm, it keeps its ears close to its side. These behaviors are important to know because when you are camping, if you see one of these creature and it is doing one of these behaviors, you know to run.  Fast. I can tell you more about elephants.  Elephants can run very fast for how big they are. You might be surprised that they can run 25 mph. and a human can only run around 10 for the average human.