Rattlesnake encounter I Crotalus sp.

Back in June o' 07 oh, (june-oh-ohseven0) I was strolling along contemplating abstract things like how many eggs you could fit into your mouth without breaking them when I came upon this little fellow. His beady little eye struck me as odd so I had to get closer to see if it was elliptical or not as mentioned in the sdnhm.org herpetology web page.SDNHM.ORG WRITES:
How do I recognize a rattlesnake?
The main features of rattlesnakes include:
a broad, triangular head on a narrow neck , CHECK...
folding fangs , CHECK...
cat's-eye or elliptical pupils instead of round ones , LET ME SEE....
usually a rattle at the end of the tail (though this may be missing or broken) CHECK...
As you can see, picking out most of these characteristics requires being close to the snake. This is why we suggest that you leave any strange snake alone.
http://www.sdnhm.org/research/herpetology/resources4b.html

-oops! I didn't read that last part.