Unless taking part in a medically-supervised sleep observation program, there's little way to tell. People can check the clock, relax, and they'll just drift off with no idea when it happened.
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It takes them about 20 minutes to fall asleep. I CAN'T WAIT THAT LONG!!
No that is absolutely not true.
The answer varies widely, and depends on the individual. Some are asleep as soon as their heads hit the pillow, while others toss and turn all night and never actually fall asleep. So the answer is: It ranges from zero to all night. "Normal", that is, a person with proper diet and exercise and no sleep problem, is generally considered to be somewhere in the range of 10 to 20 minutes.
69-79 inches
It means you only sleep little. Horses can sleep standing and for 2hrs at a time to regenerate