Fleeing from aliens

I had the longest, most vivid dream. Within the dream, it seemed to last hours, although that could just be perception. Regardless, in my waking state I can only remember a few details.

I was in what appeared to be a Navy ship. Some human-looking aliens were trying to kill or capture all of the humans, so everyone was running every direction from them. At one point I was pretending to be dead under a table while the aliens were in the room. Later, several of us were going up some stairs to escape and one guy in our group just kept blabbing on and on about stupid stuff. I kept telling him to shut up because we needed silence and every advantage in escaping. Later on another guy and I got into a small escape pod. We shot downward and I expected to splash into water, but apparently we were on a train now, so ejected onto the railroad ties between the tracks. We were bouncing around under the train and I was surprised we were missing everything under the train that would probably kill us. We eventually rolled out from under the train and then exited the pod. It was night and we were running down a hill. We joined dozens of other people running through the woods toward a river and perceived safety. There were a few little saucer drones with bright frontal lights searching the woods for the escaping people.

The aliens were probably influenced from me seeing a commercial for V last night. Falling under the train was probably influenced by a couple recent incidents of babies surviving being hit by or falling under trains. I'm not sure what caused the vividness of the dream. I was having bad neck cramps, so I was using Excedrin Back & Body Extra Strength, Bengay, and a very warm heating pad under my neck and head. Maybe I laid exceptionally still because I knew I needed to focus the heating pad on my pain.