Good clean joke but funny!!

Heard this joke on my local radio station and thought was pretty good so will post. Four old men were sitting around chewing the fat when one said " the fastest thing on this earth is an airplane. They fly at speeds over sound and they must be the fastest thing on earth". Another old man chipped in and said " no, the fastest thing on the earth is lightning. It travels at the speed of light so nothing is faster than that." The third old man said " No, brain waves are even faster then lightning. They are so fast we can not even measure the speed at which they travel.". The last old man spoke up and said " The fastest thing on this earth is a bowel movement.". The others all exclaimed " A bowel movement. What are you talking about you senile oil coot." He said " I was once on an airplane that got hit by lightning and pooped my pants before I could think about it!!"
Now that's a funny joke right there now.

hahaha...that is a good one!

yeah thats good stuff!!