This is an awesome picture. Supercell Thunderstorm by Sean Heavey, nationalgeographic: A supercell thunderstorm rolls across the Montana prairie at sunset. This was a winning shot in the 2010 National Geographic Nature Gallery Photo Contest.
Surfer of Rip Curl team surfs over the bono (natural phenomenon of rolling big waves on the river, happens before sea tidal) in Kuala Kampar River, Riau, Indonesia. According to locals, these waves reach meters height and is challenging for surfing.