I am a bonk-meister. Given half a chance (and just half an hour of riding) I will bonk, and bonk baaaaad!
Love my Clif Bloks and my nice Clif Lemonade. Something about the more complex sugars in the Clif goodies seems to keep my blood sugar level from doing loop-de-loops.
(fun meaningless trivia for those of you who do blood glucose monitoring: I can drop to the low 40s, and I would bet even money I've gone lower on some rides. Not cool!)
When I really bonk, I get the dizzy/clammy/pukey/stupid attack. Little bonks for me are just like you describe.
Always keep those sweet goodies handy!
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson