So let's use your coin flipping scenario. Only we're going to flip it five times.
The first four flips we're all heads. There was a 6.25% chance of that happening. My next flip has a 50% chance of being heads. Which if it happens, would have fell in line with the possibility of 3.125% chance. If I flip heads the fifth time, which had a 50% chance, you would assume I was in some way cheating the system and intentionally causing the coin to land on heads just because my previous for flips were all heads?