To be honest I think the slide up to D6 that one is at least semi-controlled.
Should any of these notes be included in the main thread? These notes clearly aren't just a one-off thing, as there's more on the thread's spoiler and he's got connected notes up to B5, but these were the most controlled-sounding "questionable" ones.
That high E♭6 isn't Bobby, it's the sax. You can hear Bobby singing (hooting?) the lower high notes during that part (highest he gets there is A5)
I believe it's the other way round. I posted the video without timestamping it directly because it might be useful to watch and listen to at least a few seconds before the note and question to hear him making other saxophonesque sounds and to observe the difference between his hoot-face and his squeak-face. Both the sounds are saxish, but when I look at his mouth shape, facial expression and even his posture, as well as listening to the sound, it seems clear to me that at that moment he is vocalising the squeaky note(s) rather than the hooty one(s).
P.S. Opinions on the pitch of this one are also welcome (I think we were leaning towards B1 on Discord)