First off I would like to say that I am a probability noob so I apologize if this question is dumb.
Experiment 1: You are doing an experiment where you flip a coin a bunch of times and record the results by writing tally marks under a "Heads" column or a "Tails" column. The more you flip the coin, the closer your results will be to being exactly X / X. Where X is your number of flips divided by 2. (Note that "/" here is not being used to denote division, it's being used to separate Heads and Tails results. An experiment that consisted of 4 Heads and 9 Tails outcomes would be denoted as 4 / 9.)
Experiment 2: In this experiment you will do everything exactly the same as in experiment 1, except for one thing. You decide to mark 1000 tallies in the "Tails" column before you begin the coin flipping. You now start to flip the coin and record results. This time the results will not tend toward X / X, they will tend toward X / X + 1000.
Experiment 3: This experiment is the exact same as experiment 1. This time by random chance your first 1000 flips are Tails. You are now in the exact same situation as you were in in experiment 2 (An empty "Heads" column and a "Tails" column with 1000 tallies), but this time the results will tend towards X / X. How is this possible?