I found this wonderful 4 foot high waterfall in a small canyon in the shawnee national forest in southern illinois. The cool splashing of the rivulet as it spilled out onto a catch-pool was enhanced by the echo as the sound bounced off the 3-sided grotto. Recorded on one of the hottest days of august 2011 using my rode ntg-2 shotgun mic into zoom h4n recorder.
Cool sound produced by pitch shifting down with time stretch x4 and reversing a section from the end of the third movement of beethoven's symphony #14.
I generated a "pluck" with audacity at note 45, gradual decay, and reversed it. Maybe you could add this at the end of a song as a strange ending, to be cool or something.
Walking on crunchy snow. Recorded with the zoom h4n using its internalbuilt-in microphones with the volume set on 80. Listen to this when it is hot and humid to cool down maybe!.
I created this sample by recording my broken windscreen wipers and then edit it in cool edit pro using reverse effect, reverb and time slow down effect.