Egyptian expatriates joined their countrymen celebrating the fall of President Hosni Mubarak on Friday.

In London's upscale Mayfair neighborhood, about 200 people celebrated Mubarak's departure outside the Egyptian Embassy, where they beat drums, danced the conga, hugged and chanted ”Bye bye, Mubarak” before marching through the streets, Reuters reported.

"This is the beginning of a new chapter for Egypt, for human rights, for democracy, and dignity in Egypt and the Middle East," 30-year-old student Basim al-Bahalwan told Reuters.

Egyptian barber Mohammed Zayed, 28, told Reuters that Egyptians were the happiest people in the world. "Our dignity has returned now this dog has gone."

Secretary of State Hillary Rodham Clinton warned Arab leaders on Saturday they were at the center of a "perfect storm" of economic and demographic trends that could swallow them up if they didn't quickly enact political reforms.  

"The region is being battered by a perfect storm of powerful trends," she said at a conference in Germany, according to Agence France-Presse.

She was referring to the growing number of young Arab people unable to find jobs or a political voice in countries ruled by aging autocrats.