Could this be the palindrome to end all palindromes?

A man, a plan, a canoe, pasta, heros, rajahs, a coloratura, maps, snipe, percale, macaroni, a gag, a banana bag, a tan, a tag, a banana bag again (or a camel), a crepe, pins, Spam, a rut, a Rolo, cash, a jar, sore hats,
a peon, a canal, Panama!

From
http://www.lifesmith.com/english.html#anchor4607788.

It's good -- but isn't it supposed to make sense? [fence-sitting]

Wow, and I thought I packed too much stuff last time I travelled!!

but isn't it supposed to make sense? Oh, come now--surely there are rajahs and a coloratura in Panama, don't you think?

I'm with ASp on this one.

Give the guy a cookie for having taken the time to find a pile of words that fit, but that's all.