Here's my entry for the Explosives contest:
I started with a cylinder and modified it to the likings of the base, pretty much did that for everything. The pin (which is for stringing together several into a trip-wire) was created with a 250 unit long cylinder, added 128 segments (probably too many) and bend-modified it 900 degrees. I also made it 32 sides, thought it was only 10, heh...
That's about it, enjoy.
C&C Appreciated.