Inversions

I was reading the article on Gatekeeper in Popular Scuence, a magazine I read and it states that there are seven inversions. Every time I count weather it is pictures of video I can only count six.
1. Wing over
2. Immelmann
3. Corkscrew thing (forget exact name)
4. Keyhole zero g roll
5. Diving loop
6. Zero g roll going back.

Can anyone point out where the seventh one is if there is even one?

There are only 6 inversions on GateKeeper. :)

I noticed that too, and it drove me crazy that a mistake like that was in there.

Magazines ALWAYS mess up statistics. The Popular Science also messed up the height: They state it's 165ft and it's really 170ft. Little things like that get us fans crazy.

Perhaps Popular Science considers the 360 helix an inversion.