Which Jimi Hendrix riff is this??

I have the DVD "A film about Jimi Hendrix". During the special feature on the DVD "from the Ukelele to the Banjo" Pete Townshend is being interviewed and a great riff is heard in the background.

I have asked a few fans but noone is sure which track it comes from - only that it's probably Band of Gypsys. One replier thinks 'Power of Love' but it's not the usual version that I know.

If you know I'd love to know. You can hear it at link I hope it isn't really obvious