- uneven hem
you accidently pinned the back and front together of the dress or your dress is pulling to one side instead of sitting straight, resulting in an asymetrical appearence.
you accidently bought material that was 'see-through' , resulting in you creating more than one layer for your garment , tiered.....
your baby sister came in, gave you a fright and you accidently cut both layers of material, rather than just the one, resulting in you having an 'unwanted slit' > which is only going to tear higher with time
you accidently never measured correctly and your material has gathered in the wrong places - resulting in an uneven hem, or your model just had ants in her pants resulting in your not pinning the hem correctly.
either way, designers have clearly made these 'mistakes' into fashion - such innovation ;)
i quite like it and can maybe see the potential!