There is no archaeological evidence clearly alluding to a belief in Valhalla. The film includes several easter eggs alluding to the comics or for foreshadowing. This has been seen as perhaps alluding to an unseen adventure. It contains words alluding to and echoing the lines on the original frame. These SSI would often be created with symbolism alluding to the unit's formation. "Tonight's the Night" suggests losing her virginity to another woman, also alluding to bisexuality. Tzara himself used elements alluding to his homeland in his early Dadaist performances. The cause of the departure was unknown, despite a poem alluding to betrayal. In this piece, the artist references Enlightenment values while alluding to Rousseau's social contract. The song has biblical references, with Gaga alluding to both the Old and New Testaments. Rembrandt is alluding to the Dutch idiom "cutting out a stone", meaning to fool someone. A scene possibly alluding to masturbation was removed prior to release. Ideas alluding to romance are prevalent throughout the episode. The shield is divided diagonally by interweaving alluding to the textile industry. By this, he was specifically alluding to certain Great Lakes region autochthones.