Another response for this image a friend sent:

"The humor in this picture comes from the juxtaposition of a formal setting with an informal, unexpected action. It shows a group of well-dressed individuals, possibly political figures or professionals, in what appears to be a formal event or gathering. However, amidst this serious environment, one tall man is casually standing on a scale to check his weight, seemingly unaware or unbothered by the presence of the others. The contrast between the formal setting and the informal action makes the image amusing. Additionally, the reactions of the other individuals, particularly the man looking at the scale, add to the comedic element."

It got the humor but didn't identify Obama.