A recent video taken of Thom Yorke rehearsing for an upcoming Atoms for Peace show confirms that, yes, the man is really like that all the time. In the brief video, we see our beloved Yorke awkwardly lose his marbles as he jams out to "Reverse Running" as his band mates avoid looking at him.
In all seriousness though, this is what makes Yorke so fun and engaging to watch. He's obviously having a fantastic time here and we can only expect even more energy from the man when the band when they embark on their European Tour in July.