After you're done laughing at this photo, make sure you look at Niki's right ass-cheek - the shutter was clicked right at the moment of smack-impact and you can see the shockwave traveling across her bum!
KERRRR-RACK! (After you're done laughing at her amazing expression, take a second to realize how friggin tall this woman is [keeping in mind that she's half bent-over in this pic]).
Turns out, Ralf had the same digital camera as me and he showed me all these features I didn't know it had...like this picture taken with the "Ambient Light" setting that masterfully captured a ghost slapping Claudia's ass!