Getting "object references itself" error trying to execute @evt.attributes.to_json

I have a class named "Event" and am trying to get values out to pass
into a javascript method. If I use,

<%= @evt.attributes.to_json %>

I get the error message "object references itself". For debugging
I've tried the same call in the body tags of the template and get the
same result (even when I remove all references to the javascript).
When I simply use <%= @evt.to_json %> I get the following.

{attributes: {start_date: "2007-07-11", city: "Spokane", addr1: "",
name: "Bobdogs Wide World of MA", latitude: "47.5", category: null,
zip: "", addr2: "", url: "", contact_phone: "", country: "",
hosting_studio: null, id: "1", description: null, contact_email:
"", longitude: "-122.6", num_days: "1", end_time: null,
start_time: null, contact_name: "Bobdog", state: "WA"}}

Pretty much at a loss, I've successfully used the same code for
another object but for the life of me can't figure out why it won't
work with my Event object. I "Event" a bad name for an object?
Reserved word? I tried renaming some of the objects attributes, but
still no luck.

Any help would be greatly appreciated!!