Schwarzenegger, 71, was chatting with fans at the Arnold Classic Africa, an event showcasing bodybuilding and other sports, in Johannesburg when he was kicked from behind.
A man struck Arnold Schwarzenegger with a flying kick at a sports event in South Africa on Saturday, though the actor and former California governor later reassured fans that they needn't worry about him.
"There is nothing to worry about. I thought I was just jostled by the crowd, which happens a lot," the star of the "Terminator" films wrote on Twitter, thanking fans for their concern.
"I only realised I was kicked when I saw the video like all of you. I'm just glad the idiot didn't interrupt my Snapchat."
A video of the incident posted by Schwarzenegger showed he was not felled by the kick.
The assailant was quickly restrained by a security guard.