Exploding Pen !

This pranked pen looks like a standard pen until.. BOOM!!!!!

 

 

Disclaimer: I am not responsible for any injuries such as bruises, scratches, or drawn-on items.

Gather one "Pentel  Wow! bk440" pen and a random pen that uses a spring. 
Someone to prank.

This should come natural to you, you should be a hacker !



While doing this you should make sure that you separate the pieces so you know which goes in to the "Pentel Wow! bk440' pen case in the next step.

So, seeing that you've come this far I'll show you how to do this.  Take the spring from the random pen and drop it into the "Pentel  Wow ! bk440" pen case. 

Assemble the pen the way you found it, by dropping in the ink cartridge and and pushing the clicky-thingy back in. 

Give somebody, preferably a person that wouldn't mind a nudge of humor, the pen and ask them how to disassemble the pen. If you built it correctly the button, ink cartridge, and second spring should shoot out at them.