Hahahaha this thread is the best!
I still remember when I was about 8 years old I used to do Little Athletics every Saturday.
I was practicing high jump and I ran as fast as I could.. As I jumped I let out a huge Gary!
I then climbed down and clutched my knee saying it cracked as I was jumping. One of the other girls turned and was like "oh my god I heard it that was so loud!!" Then ran off telling everyone how loudly my knee cracked.
The two adults supervising were concealing their laughter and I was absolutely mortified.