How do I break the yellow block surrounded by grey blocks in World 3-1?
- Get large after eating the first meat.
- Destroy the X-Naut so you can feel safe (however, you aren't necessarily safe)
- Go to the left of the yellow block, so you can see the whole block in your screen.
- Then go to the bottom-right side very very slowly, so you can see much more of the yellow block.
- Finally fire to destroy the yellow block!
Not having the game myself, I couldn't test this, but I think I figured out how to get it.
I read a whole bunch of walkthroughs and watched LP's but everyone just skips that block. I think if you go past the gray blocks with Bowser as big as you can get him, then turn around and breathe fire it should destroy the yellow block. There's a hammer guy immediately after this that you would then take damage from (or the fire stick I guess) to get really small.
Whatever the object is would fall into the lava, but (from one of the LPs I watched anyway) the item sits on top of the lava. You should be able to drop, grab the item, then jump back up before hitting the lava.