Enjoying the new-look site!
By sending a load of noise to a fofilter opcode you can make a great rumbling explosion sound, kinda like an atom bomb:
k1 linseg 0, .01, 1, p3-.01, 0 ;envelope for noise amplitude
k2 line 55, p3, 20 ;envelope for fofilter frequency peak
a1 noise 1000*k1, .7 ;Generate noise
a2 fofilter a1, k2, 0.007, 0.04
Doubtless someone will tell me there's an easier way of doing it :)