Crested Saguaro

"The cause of cresting is not fully explained; biologists disagree as to why some saguaros grow in this unusual form. Some speculate that it is a genetic mutation. Others say it is the result of lightning strike or freeze damage, but whatever the stimulus, the growth point of the stem has switched from a geometric point, to a line, which folds and undulates as the crest expands. Though these crested saguaros are somewhat rare (1 in 250,000), cresting occurs naturally throughout the range of the Saguaro, and can be encountered in many other cactus species."

This is the second crested saguaro that I have seen in the past few months.
I guess the odds are much better than winning the lottery! :)