Connections

mentioned by Kalkofe, discussing Thomas Ohrner's career

mentioned by Kalkofe, recalling the story of creating "Gib Gas - Ich will Spaß" since the original screenplay was reworked into this movie

The doctor of the asylum calls one of his patients "King Kong"

The water drinking joke is reused

title reference

The doctor of the asylum calls one of his patients "ET" and mentions his magical finger. Also the classic line "Phone home" is quoted

final scene is spoofed at the end of the movie