The dynamic diffuse wall (DDW) structure discovered previously in bubble material using high-speed photography has been investigated in detail here. The reflection (Kerr) mode is used to study the wall dynamics at the surfaces and the results are compared to the transmission (Faraday) mode which shows wall dynamics in the bulk of the film. It is clear that the DDW structure is a wall deformation through the thickness of the film. The mechanism for the deformation is based on the spatial variations of in-plane fields at the wall through the film thickness, due to the addition of the stray fields from the divergence of magnetization at the film surfaces and the applied in-plane field. This causes different parts of the wall to move with different velocities. Ion implantation decreases the width of the DDW which has its trailing edge next to the implanted surface by increasing its velocity compared to the trailing edge next to the as-grown surface. Both the drive field and the in-plane field enhance the wall width due to the functional dependence of the wall velocity near the surfaces on these fields. It is easier to form the structure in samples with a lower anisotropy since the surface tension field opposing the deformations is lower in these samples.