Heeeeey!  I managed to record the sound of my boot stamping on my van floor......and to add the "umph" to this I've used the sound of a microphone been gently (and I stress gently) bashed against my hip bone.....a method I use frequently when I'm experimenting on new material using my loop pedal. So, now I have to edit these and then transfer them to my drum machine, ha ha! A great sounding organic, hip hop style kick drum, unusually created! Flippin' magic!