I haven't been tickled in a ,long time,. but when I was.. and especially when I was gang tickled.
The body sensations of being tickled, especially by several girls, felt like. zapping motions all over my body, like if I was zapped with a stun gun in my body. (Sorry if that definition isn't exactly right, but that's how it felt). Also, the laughter was so intense, I sounded like the high pitched scream/squeal that a girl's laugh might, and, like someone else who posted in this thread referred to for themselves, I felt like I could not catch my breath.