I knew it would get figured out eventually. CashCrazed is correct.
In 4-3, there is a bonus area with a balloon (the one you ground pound to inflate) and a row of coins. At the end of this, there are 5 red coins (I think) and a Goal Ring. If you fall, you drop down a hole, and if you go all the way to the right of the lvl, there is another, different Goal Ring. Check for yourself.
CashCrazed gets the next question, if he is interested.
------------------------------
What? Someone made a really dumb comment? This looks like a job for...
CYNICMAN!!!!!
That''s right! CynicMan, protector of tactlessness, enforcer of raw, abusive sarcasm!
Cynicman: What kind of introduction is THAT? It''s not even a sentence!