Apparently while David was innocently walking the toy show, some Teletubbies snuck up behind him, tapped him on the shoulder, and attacked him with a hug from 3 sides. Later they were spotted bragging about their hugging spree to anyone who would listen.

Don't worry, David was rescued from this Teletubbie humiliation, by his good pal Buzz.
Donations can be made to the "David Gibson Mental Health Fund" at your local Key Bank (if Key bank still exists in the morning) to help his family off set the costs of treatment for post traumatic tubbie syndrome.