German Chancellor Angela Merkel was seen shaking again on camera as she stood next to President Frank-Walter Steinmeier on Thursday - her second such incident in less than two weeks.

Merkel's upper body began visibly shaking as she stood next to Stinmeier, causing her to fold her arms as if bracing herself. She was offered water while the German president spoke, yet declined according to Reuters. Of note, she blamed dehydration on her first shaking incident on June 18.

A spokesman said later that she felt better after some water, which apparently cures whatever she's got going on. "Everything is taking place as planned. The chancellor is well," said the spokesman.

After the incident, Merkel proceeded to the Bundestag lower house of parliament for the swearing in of Germany's new justice minister, where she showed no signs of shaking and looked relaxed while chatting and laughing with Vice Chancellor Olaf Scholz.

As Reuters notes, "Were Merkel to be incapacitated, Steinmeier would appoint a cabinet minister as acting chancellor until parliament elects a new chancellor. This need not be Scholz, a member of the Social Democrats, junior partner in Merkel’s ruling grand coalition."

Sleep camel?

Merkel is known for pushing herself to extremes, joking in the past that she is a "sleep camel" who can go for several days on just a few hours of sleep, as long as she catches up over the weekend. That said, aside from slight hand tremors, uncontrollable shaking isn't exactly known as a side-effect of sleep deprivation.

On Thursday, Merkel will fly to Japan to attend the G20 summit before moving on to Brussels for an EU summit on Sunday at which she will play a key role in trying to secure a five-year deal for the distribution of the bloc's top jobs.

Asked about her shaking, Interior Minister Horst Seehofer told the press: "I won’t comment on this. I have never taken part in remote diagnoses because for years I was too often the subject of remote diagnoses."

That sounds a little different than dehydration...