You ever been in a situation where you are choking?  It's super scary.  I will never forget one time when I was a kid choking on a chicken bone.  It somehow got lodged in my throat and I started choking.  My Mom opened up my mouth and reached into it and grabbed the bone out with her bare hands!  Not the classic technique, but it worked.  I think most people have been through a choking episode before.  And as humans, we aren't the only ones that have bitten off more than we can chew.  Check out this crazy video of a Great White choking on a sea lion...