Moskito - Die Hexenfalle(1992)

An unknown force from outer space once made its way to earth 3,000 years ago, flying around as a yellow dot like a mosquito and feeding on human flesh bite by bite. A voodoo priest from the Caribbean decided to take up the fight against the evil. But even he, after banishing the alien into a shell, could hardly prevent the modern civilization of the present, or Jochen's clique, from bringing that curse back to life one day while having fun in the bath. Holidaymakers beware, the yellow danger is on the loose!