I've scoured the archives here for something that could answer my question. Google answered "impalement" and its synonyms with mostly historical accounts or wonderful happy stories of saving people from death by impalement. Wikipedia was helpful. I looked up impalement itself, and then just sort of went through everything I could think of, from torture killing to Christian martyrs.
For the bit about the fence, Wiki was unhelpful, and I'm unsure how to Google it. Everything I tried gave me people trying to sell me fences.
Anyway, the setting is a moderately sized, fictional city in Virginia, US. The present.
On to questions?
If not, I was planning on going with a bit of horrible bleeding, probably from the wrists, to speed things up a little.
Also, am I correct in thinking that, if the fence were fairly tall and showy, the rod would make it out of his body, too, before the first horizontal bar stopped him? I'm pretty sure this varies fence to fence, but just, yanno, average.
And, uhm, sorry for the rambliness. I wasn't too sure about how to ask. Thanks in advance.
ETA: Got what I need. Thanks again to everyone who helped!