There's a song that I keep hearing on a classic rock radio station. Usually if I like the song, I can figure the name out by googleing some of the lyrics. Unfortunately, in this case, it's completely instrumental.

Seems to me that it's somewhere around 3 minutes long. It has a part about halfway through where a choir is going "ahhh". The guitar parts remind me of the beginning of the Who's "Pinball Wizard" (mostly because the mystery song keeps repeating a fast riff that kinda sound like the beginning of PW).
I hope I've given enough information. Otherwise, I'll have wait until I hear the song again before I can identify any more of it's characteristics.
Hopefully, someone here can make a connection. I always listen carefully after the next fews songs play, but the DJ always falls just short of identifying it when he lists the songs he's just played.
Thanks in advance!