I did something similar, many moons ago I had two sports bags with 2 crates of beer in each which I was carrying over London Bridge. (was much stronger and fitter then).
And as you do when you walk against the flow you keep to one side to not get knocked all over the place.
However you alway get one tosser who expects you to move. I wasn't going to purely as I had several KG's of beer in each bag.
As we got closer and closer he could tell I wasn't going to move so he thought he'd be clever and knock one of the bags with his shins.
Big mistake. Huge mistake. The scream of pain made everyone on the bridge look at him. I just said "better look where you are going in future" and continued my journey!