Escapevelocity:theminimumspeedneededforanobjecttoescapefromthegravitationalinfluenceofamassivebody,withouteverfallingback.Anastronautawakensinanabandonedcaveofastrangeplanet.Aninterstellarvagabond,sotosay.Alightpathleadshimtothesurface,wherehelooksathiscompassandheadsforhisspaceship.Hekeepsglancingback,treadingnervously,lookingafraid.Hehasbeenchasedbyacreatureforalongtime,andhisonlywaytobreakfreeistoescapethiscuriousplanet.