Counting Mississippis is a useful tool for any time you don't have a stopwatch and you want to count in seconds. What you do, is just count regular, and say the word "Mississippi" after every number. One Mississippi, Two Mississippi, Three Mississippi, Four Mississippi, Five Mississippi. That there was 5 seconds. It always works. If you don't believe me, try timing it with a stopwatch or a second hand.
Hey genius- If I had a stopwatch or a second hand I wouldn't have to count all those dag-blame Mississippis in the first place!