October 31 [14:00 EDT] -- If one of the guys doing lighting for Sparklehorse during their opening stint for Radiohead looks familiar, don't be surprised.

Jonny Greenwood, Radiohead's guitarist, has stepped up to help out the band behind the board while the two groups are touring together in Europe.

Fans in the States may have noticed Greenwood filling the same role for Teenage Fanclub who opened for Radiohead in the U.S. earlier this year.

Greenwood and his Radiohead counterparts, who are still riding high on the airwaves with the clip for "Karma Police" [2MB QuickTime], aren't expected to return to the States until next year.