[dsmghost]

I had a fuel cut type of issue that was caused by a bad TPS once. Car would fall on its face like hitting a brick wall during a pull. It would do this mid throttle, where the TPS usually sits during cruise. The TPS wore out in that spot of the throttle position, so the ecu shuts injectors down because it appears I let off throttle (decel inleanment).

However it is most likely a ignition related misfire like every one else says. Ignition wires are the weakest link. You could try misting water on them with a water bottle and check for arching.