Back to the SWATPERP video at the MPD website. The item in the left hand as SP swings the hammer into some glass, all the way at the end of the video, is clearly a square ended, rectangular object with smooth edges. It is shaped like a box of Saran Wrap and that is why everyone called it that. When the photo is enhanced, it looks like Godzilla eating Tokyo, all jagged edges and what appears to be empty space. It is not. Clearly, it is a square ended, rectangular object and much like a box of wrap, has no empty space. Although I truly appreciate the enhancement, it was of no help and, to me, is too distorted to use in a meaningful way. I think the MPD video image is clear enough to see the details of the shape of the object.
So, before we launch into the absurd, can we figure out what object, shaped just like a box of wrap and which is definitely not Godzilla eating Tokyo, is in his hand? I notice some movements at that scene that suggest to me that SP gained entry into the room behind what I assume to be a door with a glass window. All we can see are SP's feet but I think they move forward, into the room. Before this, SP's left arm raises up, as if grabbing the door jamb up high, then the foot moves forward. It is a very brief moment.
Study those last few seconds if you will. What could be of use in his left hand, at the door jamb or through the broken window, and looks like a box of wrap? If it served no purpose, SP would not have hung on to it but it stayed in the left hand as the arm rose high. Huh. What help did it provide in getting into that room?
Of course, it could be a box of cookies from the kitchen.
At one point I jumped as I thought it was a bottle of barbeque lighter fluid but convinced myself after seeing the same sequence over and over that I was just tired. Anyway, it has a purpose. It is not a tri-pod ,or a ramming tool, or the panic bar from another door or anything else that has been suggested on these 29 threads.