Vintage acrobat

A girl standing on tip toe on a champagne bottle in a pleated costume and top hat from 1904. Is this even possible? My balance is absolutely terrible so it certainly seems impossible to me. Do you think this is a trick photo or just some acrobatic brilliance..?

Source and copyright: This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1923.