ping, shoot, explode...
The main thing I remember about the Oric-1 was it had preset sounds for (IIRC) ping, shoot, explode and laser. So you'd go into WHSmith and quickly knock up:
10 ping
20 shoot
30 laser
40 explode
50 goto 10
and leave the machine pinging and exploding away until someone came over who knew how to stop it...