Ghost Knife... Do Jugglers really do it this way?

geanmichaels

Ghost Knife: Here's an interesting artifact:

:dunno
From this image:

http://gean.smugmug.com/gallery/1178070

Date Taken: 2004-06-27 15:44:43 Date Modified: 2006-02-08 11:30:35
Make: SONY Model: DSCF717 Original Size: 2560x1920
Aperture: f/3.5 ISO: 100 Focal Length: 37.7mm with 1.7 doubler attached
Exposure Time: 0.008s (10/1250) Exposure Program: Normal program
Exposure Bias: 0 ColorSpace: sRGB
????!!

Mike