My first thought, when I read about your "limited experience," was to wonder just how many people you've robbed.
Seriously, though, your point about not seeing the second assailant is a very good one. We are constantly reminded in class that any aikido technique should do five things simultaneously:
1) deal with the primary attack
2) deal with the follow-up attack
3) lead the attacker's balance
4) deal with the possibility that the attacker has a weapon
5) deal with the possibility of more than one attacker
It seems like a lot to think about, but good taisabaki seems to take care of a lot of the list above.
Personally, I'm working on self defense against bears! Look at this news article:
Judo Throw Saves Man From Bold Bear
MATSUMOTO, Nagano -- A man used a judo throw to scare off a bear that attacked him while he was picking mushrooms on a Nagano Prefecture mountain Monday afternoon, police said Tuesday.
At around 3:50 p.m., Keiichi Yamaguchi, 63, a resident of Matsuda, Kanagawa Prefecture, was picking mushrooms on a mountain in Omachi, Nagano Prefecture, when an Asiatic black bear suddenly attacked him, police said.
The bear bit Yamaguchi on the hand and left thigh and he responded by hitting it on the nose and in the stomach. When he used a judo technique to hurl the bear, it ran away from the scene. The bear was about 170 centimeters long, police said.
Yamaguchi said his injuries are not serious, but he intends to receive medical treatment at a local hospital. (Compiled from Mainichi and wire reports, Japan, Aug. 19, 2003)
There are a lot of bears in Pennsylvania. I'd better get training.