Robot parts outside of the field.

[MBF]

If a robot was to have a large swinging arm of up to 12' in length around 4' avbove the ground that at some point would travel outside the boundaries of the field, while not touching anything outside the field, would this be in violation of the rules. A large arm like this might violate safety rules because it could threaten the nearer members of the audience, but is it specifically against the rules.