In this off-the-cuff video, MIT prof and MAKE pal Gregory Charvat shoots Nerf darts into the beam of an old X-band Doppler radar gun with its output hacked into a linear power supply, a preamp, and finally into Greg’s living room stereo system.  The signal sounds like a cartoon sound effect!  The shot at 1m25s is an especially good one. [Thanks, Greg!]