Unlike most of the nightmares on this list, this dream is very direct and simple to analyze. Feeling trapped or lost in a dream indicates a concern of being lost or trapped into a certain situation or position in your waking life. Are others pressuring you into doing something? Do you feel as though you've been lost in the shuffle of things, or you've run out of options?
Realize this dream is a direct warning to your internal concerns, and it should be a cue to consciously address these feelings before it's too late. Otherwise, you may start having this next type of nightmare.