[
Out Of Milliways: Down In The Brown 'neath Modoc Town, or: Outdoor Plumbing and Inadvisably Applied Explosives]
What occurs next goes by very quickly, but is fairly simple to follow.
It's starts with a door to the bar pushed open with such force as to swing back as far as it will go before slamming shut again, but not before the entrant is well inside and headed directly for the door to the lakeside, as evident in the trail of footprints consisting of... well, it's dark, slightly damp and odorous. Let's just pretend it's mud, shall we?
Outside on the grass the footprints become a trail of boots, outer clothes and portable electronics hastily divested one by one, ending with a wholly unencumbered human body diving into the water.
A puzzling sequence of events, but ultimately one in the best interests of any bystanders with a sense of smell.