Byrony felt someone watching her as soon as she stepped aboard the afternoon shuttle for Mars. Glancing surreptitiously, she saw no one she knew and no one watching her. Which was good since she wasn't supposed to be here and must be the source of the feeling. Hefting her backpack higher onto her shoulder she continued down the aisle, the feeling accompanying her.
Keep it under 1000 words and include the following words. It can be helpful to spread them out rather than trying to cram them all in at the beginning! :-)