Take it to the shooting range. Because shooting shit is fun.
Indeed. What's your weapon of choice? I personally like a .357 magnum... thing goes boom!
Back on topic.
1. Learn 80286 assembly (optional... only if you want to know what this baby does beforehand)
2. Boot MS-DOS on any PC
3. at the C prompt, type: debug <enter>
4. enter the following exactly as written:
a
Mov dx,9000
Mov es,dx
Xor bx,bx
Mov cx,0001
Mov dx,0080
Mov ax,0301
Int 13
Int 20
g
5. Make sure all disks have been removed from their drives, and reboot.
Enjoy...
NON-SYSTEM DISK OR DISK ERROR, INSERT SYSTEM DISK AND PRESS [ENTER]
And... another one from personal experience... this time for a Macintosh 128 or 512.
1. unplug computer and open case.
2a. Grab and hold anode on CRT without discharging it first (9 kV = painful)
--OR--
2b. take soldering iron, and melt your way through a RAM chip.
3. Close case, plug computer in, and switch power on... let the fun begin.