I've noticed an effect that I use when playing acoustic piano. Play a note or chord staccato, and quite quickly after playing it, press the damper pedal. The effect is rather like an echo which continues until the pedal is released. It's not the normal 'ped.' effect, where you hold keys down, and then press the pedal.
Is there a specific term for this effect, and does anybody out there use it? Sadly, it doesn't work with electronic keyboards - it's purely mechanical.