When I was a kid, a wasp went into my uncle’s beer can at a backyard BBQ. My uncle didn’t notice and when he took a drink he swallowed the wasp. It stung him 5 times on the inside of his throat and esophagus, and he had to be rushed to the hospital because his neck was swelling up. He wasn’t allergic or anything; I guess that can just happen if you are literally stung from the inside. He survived, but it was a very close call, according to the doctor.