A fair common sense as well as years as a clinician give me pause when I am presented such single incidents of behavior. My sense of fair play tells me such “gotcha! games” prove nothing and can ramble on in an endless series of vendettas over trivia.
Obama has been in the business of selling self his entire adult life. He is a narcissist. Anyone who writes two books about himself before he has even achieved anything of note is definitely stuck on himself. The narcissistic personality does not find humor in any sign of imperfection and whoa! be to he who causes the narcissistic personality some embarrassment (reference the guy backstage).
Such behaviors find significance when they are embedded in a pattern rather than a single incident Suffice it to say hammer will keep an eye out and offer an analysis when I feel I have a solid case. But such behavior would be concordant with his personality.