Thanks folks!
Rik, I just adore BBC Science & Nature TV series!
Here you can see some details of spider's "enveloping technology".
He is placing a sheet of silk, with help of one leg, in right position while rotating grasshopper with others.
Camera model Olympus SP-320
Date/time 18.08.2006/11:01:23
Exposure time 1/500 s
F-number f/4.5
ISO 64
Focal length 8 mm