But, how can you be completely convinced only having heard 1 side of the story ? I wouldn't want you serving on a jury, that much is for certain !!
It's called experience I have lost count of the times I've dealt with people failing to get off at stations, and each time it's because for whatever reason, they didn't get to the door in time. Every time, they say 'the door wouldn't open' or similar. Yes - for very good reason; I'd closed them having got the tip! Thankfully I've never had a situation where there's been a young child left behind and a Mother overcarried. Still, at least I'll know what not to do when it happens eh?
Like I say, ask yourself why the experienced traincrew in this thread are saying the same thing? I don't really care why you don't believe us, but I'll bet you a pint or two that we're right!