Day Trip

The train rumbled and clattered along and he looked out of the window, mostly satisfied with his day at the coast.
After a while the rumbling and clattering of his stomach became almost as loud as the train. He knew the fish and chips he'd eaten had been sub-par, but now they were potentially going to make a reappearance.
He vacated his seat and headed for the toilet.
Once safely locked inside the hermetic cubicle he lifted the lid of the toilet. It was full of paper and based on the smell something a little more sinister lurked beneath it.
He pulled the handle to flush it away and nothing happened. He pulled it again.
There was a loud gurgle, but nothing happened in the bowl.
He attempted another flush.
Another gurgle, followed by clattering. He felt a blast of pungent air coming from the toilet.
It stank in the cubicle and he wanted out. He pressed the button, but the door didn't open.
The toilet gurgled and clattered and more shitty air  blasted from it.
He tried the door once more without success.
One final ear-splitting gurgle and a brown geyser erupted from the loo coating him and the cubicle in a faecal cocktail.
The train rumbled and clattered on.