Turn the cake out onto its serving plate as soon as it comes out of the oven. Remove the paper from the top and leave to cool before serving.
Remarks
If this is to be an "adult" cake (that no children will be eating - whatever else were you thinking?!), you can also add 2 tablespoonsful of rum with the lime in stage 5.
If you would like a syrup to serve with the cake, after taking the pineapple out of the pan, deglaze it with 2 glasses of pineapple juice + the juice of a lime. Leave this to thicken on low heat. Serve in a sauce boat, preferably hot or warm.