Sorry, I didn’t see him in any kind of melt down. On the contrary...he seemed rather kiddie about the whole situation.
I didn't either. Unless you count the meltdown in the speech department. I can understand being interrupted, but he wasn't making any sense with the words he was using.
It sounded like once 'interrupted' he could only remember certain 'key words' to recite, and wasn't really able to put them into any kind of meaningful sentence.
Some people have never seen (or had) a real meltdown apparently. Those of us who have witnessed a REAL meltdown would call this a case of being slightly annoyed. One of my very rare meltdowns would make Obama in this video look like a purring kitten!