Not much call for it, but here goes: Open up an instance of PSYN II, and Initialize a patch under the Disk icon. Disengage the sine oscillator, and enable the internal noise waveform instead. In the default settings of the amplitude EG [A}, raise the release slider to full up [10 seconds]. Enable another EG, with the Depth at full and the Dest set to Cutoff 1. In the EG, set the Decay to maximum, and the Amt to -100%. Filter one's Cutoff and Resonance are at maximum as well.
Enable an LFO with the Depth and Speed sliders about halfway. As with the EG, the Dest is Cutoff 1 at full Depth. Pressing any key will freak out the filter, and releasing it will spray whipped cream all over the place. Not as tasty as "The Girl from Ipanema", but this should serve as a starting point for further explorations into P5 toppings. HTH.