Typical of the theatrical practices of the time , `` Giselle '' was preceded by an excerpt from another production -- in this case , the third act of Rossini 's opera , `` Mosè in Egitto '' .
Typical of the theatrical practices of the time , `` Giselle '' was preceded by an excerpt from another production -- in this case , the third act of Rossini 's opera , `` Moise '' .