He took 3 pics, with an interval of 15 sec. ( what it takes to save in his camera)
He sees a light and thought it was a lighting and check immediately to see if he really catch it. To his surprise the light he catch was not part of the Thunderstorm... it was a beam of light coming out of the top of the Pyramid dedicated to the Feathered Serpent God.
He was so exited that he show the pic to all the people around including a some Maya priest who ask him to keep the pic hide of the public. But another tourist there was a famous TV star and he convince them to show it to Jaime Maussan.
A containing was posted originally in the Italian website Segni dal Cielo, "Signs from Heaven", managed by Massimo Fratini, supposedly the same guy that took the pictures in front of Kukulkan pyramid. Or by someone from Italy, close to Fratini. This assumption is based in the screenshot of the computer's directory where the pics were stored. The answer is in his own website.
It seems the original images were sold to Mexican investigator Jaime Maussan, that immediately sold them to some Mexican TV channel and the matter you can watch right now: