Northbound Northern line train arrives at Waterloo in the Friday evening peak. Platform is pretty crowded, good number of passengers waiting to get off the train of which I am one. Train stops, people on the platform move aside to allow people off the train. One man is standing half way along the "gap" of people with a pushchair in front of him, child in the pushchair.
Doors open, he puts his head down and starts to walk up the gap created by people standing aside, pushing the pushchair ahead of him. I step off the train, take one step and find my way blocked. I quite bluntly tell him to let passengers off the train first, MATE. He looks up very quickly, sees the not very impressed look on my face. Retreats backwards muttering "sorry sorry sorry sorry", walking into several people behind him.
Another time, also at Waterloo, mainline platforms. Waiting for a fast Weymouth with a couple of other regular passengers. The rear five carriages have arrived, we're lined up waiting for the front five to arrive, standing where the front door would be. We stand a step further up the platform to create space for people to get off and usually form a line which others join as we wait.
Train arrives and the line forms. As it attaches to the rear five carriages, a woman walks up the platform and stands on the track side of the yellow line, right in front of one of the regulars who looks back at us with a look of "did she just do that?!". Train attaches and the doors open. She takes a step to one side, forcing the regular to take a step aside to avoid her walking into him. As soon as she can get on, she does. First person on, and takes a seemingly random aisle seat towards the front of the train. I, and the regulars shake our heads and get on. One of them says just a little too loud "Must have been in a hurry to sit down then!".