An early memory I have is of swimming at the YMCA and my little sister "drowning" in the deep end of the indoor pool. I say "drowning" in with hesitation, because from my memory she was not, in fact drowning. If my memory serves me right, my sister could not get her foot on the ledge and kept slipping, therefore her head would go under the water, yet resurface. She was not 'drowning' in my memory because she also had a water toy to hold onto.
When I asked her to relay the same memory, from seven years ago, she strongly believes she was drowning in the pool that day.
The two memories differ slightly, one reason this is the case is because memory fades over time. An example of this is an illustration in the textbook, Psychology: From Inquiry to Understanding, by Salvador Dali, which relays images of clocks melting like wax. Another reason the same memory might slightly differ for two people is although our episodic memory, the "recollection of events in our lives" might serve us well what we choose to remember can differ (Lilienfeld 252).