These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The "Lucky!" sound whenever you pick up an Air capsule.
The sound of the player getting squashed ... or dying from lack of air.
The "whoa!" sound, occurring when the player is shoved aside (instead of being squashed) by a falling block. It tends to occur in the middle of large chain reactions, and because it leaves them momentarily incapacitated, chances are high that another falling black will imminently squish the player.