Possible Mission?

I was sat on the train last night, enjoying the luxury of half an hour immersed in a book when something caught my attention out of the corner of my eye. To begin with it was just a movement, but as I focused in on the area that had moved, I realised it was a spider, just dangling in mid air. It hung there for a moment, gently swinging with the rocking of the train. Then, almost like it realised it had been spotted it started shimmying back up its thread - a la Tom Cruise in Mission Impossible - until it was back inside and access grid in the ceiling of the carriage.  I wondered what his mission might have been? (You notice that I decided that it was a he but I base that on no knowledge of how you identify the sex of arachnids ...) I wondered if he was just the advance reconnaissance agent, and that there was in fact a team of spiders up in the access hatch with him plotting their next mission down into the carriage? Were they perhaps all going to come tumbling out of the multifarious holes in the panel going 'hut hut hut', US Marines stylie, surround me and wrap me up in web like Shelob does to Frodo?

That would be really scary and would actually fit in with a recurring dream I've had since childhood.  I'm chased by a giant spider that wraps my head in web which then starts to melt me ... (oversharing? maybe ...) Either way, the reason I manage not to let this dream bother me in adulthood is that there are of course no giant spiders.  However, it then started occurring to me that maybe the giant 'dream' spider is just a metaphor for a swot team of real sized spiders who could potentially work together to achieve the same result? Hmmmmmm.

Suffice it to say, I got a grip on that notion and you'll be pleased to hear that I made it off the train in one piece and headed for a calming glass of chenin blanc.