Word or phrase for becoming clumsy due to being overjoyed/happy

As the title implies, I’m trying to describe a person who is extremely happy and because of that behaves clumsily since they don’t have enough attention about their surroundings.

The specific case would be that the character is in a celebration, and trips and falls, or breaks her mug banging it to others’ during a toast etc. It’s important to note that they’re not normally clumsy at all, and these would not happen to them if their mind wasn’t focused on the joy and celebration at the moment.

I was wondering if there is a word or phrase to describe this elegantly?

For example "The ____ that he was at the moment, he spilled most of his beer on the table when banging his mug to others’ for the toast." or "He had a _____ , not looking where he is going and bumping into guests while running from room to room in the party."

What came to my mind was joystruck, or joy drunk but unfortunately they aren’t actual words. Having a mind over-saturated with happiness might describe the condition, but is too long and I was hoping a more common word/phrase exists for it.