Huh. I thought that was a joke. I bet there's some way to do it... and I bet that's what Shiggy was talking about when he said "something happens".
Anyway, I have a few more bugs...
Get Yoshi over a manhole. Pound, and right as you hear the manhole start to flip, jump off Yoshi. You will not fall through the tunnel, and the manhole will come crashing down on your head, not damaging you.
Also, if you have Yoshi squirt some juice and jump off, the juice will change to water on the ground. Also, if you spray some water and then jump on Yoshi, the water will turn to juice.
Also, I think it's rather odd that Yoshi can spray juice and stick his tongue out at the same time. Actually, I think it's rather odd that Yoshi can spin jump, flutter, spray juice, stick his tongue out and ground pound all at the same time...
Eeh hee hee hee hee!!! Not everything means what it seems... . . . Ooh Heh . . . Ooh Heh