What funny/weird/interesting/lunatic observation have you made recently?

Yesterday I witnessed this strange phenomenon (as I did several times before that): me and my girlfriend were in bed, in the spooning position, when one of our stomachs started rumbling (from being hungry).
Weird thing was; we both couldn’t determine whose stomach it was that made that sound.
Isn’t that weird, you would expect that humans could feel any movement that goes on in their own body, but we both could not.
Do you have a weird/funny/interesting/etc. observation that you made recently?