Thank you for the replies.
My son is fine. Thanks for asking.
He was rushing and thankfully wasn't hurt.
We actually were able to put what was left of the key in and lock it so we could travel home. (It happened on the last night of an 8 night trip!)
We are going to try the tips in the video (thanks for posting!). Hoping to not have to call a locksmith.
We have Coach net (included for a year with the purchase of the 233s). Would they be able to help? We have only had the trailer since Feb.; would this be covered under the warranty if we can't get the broken key out?