Where do you live? Are you sure it was a corn? A lot of people confuse eastern milksnakes with corns.
Corns get an average length of about 4 feet. I've never come across a mean cornsnake. I'm sure there are some out there, but for the most part they seem to be the best snakes if you want one with a nice temperament.
Get "The Corn Snake Manual" by Kathy Love. It has most of the info you may need.
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alstiver@hotmail.com
1.0 2001 Hypo snow cornsnake
0.1 2002 Pastel Ghost cornsnake
1.1 2002 Bloodred cornsnakes
0.1 1998 Het Hypo, Het Caramel cornsnake
1.0 2000 Hypo Het Caramel cornsnake