ORIGINAL: exeter_acres
there are no vertical lines in a 1/2 cuban
sounds more like a figure 9 to me
Exeter is the closest yet but still wrong/incomplete. Cubans have no vertical lines as he said.
A figure 9 is a 3/4 loop which often leads to a dirt-nap.
The described manuever is referred to as a "Humpty Bump" with a 1/2 roll on the "up line". It's a common manuever in both model A/C and full size aerobatics.
http://www.iac.org/begin/figures.html#Humpty-Bump