"Americans, behave yourselves," he needled today as a contingent of US and South African media was pulled from a quick photo op with President Jacob Zuma.
Obama spoke just before their joint news conference and may have been trying to suggest his press corps keep its questions tight.
Today, both US and South African reporters asked multi-part questions. Obama didn't try to cut anyone off, but instead said the US press corps must be happy the news conference was taking place in a wood-paneled chamber inside Pretoria's grand Union Buildings.
He kept up the theme of a long-winded US press at the start of his meeting with African Union Commission Chairwoman Dlamini-Zuma.
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"I might take some questions, except earlier in the press conference you guys asked 4-in-1 questions," a grinning Obama teased.
At his earlier stop in Senegal, Obama apologised to host President Macky Sall on behalf the American media.
"Sometimes my press -- I notice yours just ask one question," Obama said. "We try to fit in three or four or five questions in there."