1.   Vents allow any steam to escape if the system overheats.

2.   Steam escaped from a long crevice in the volcano.

3.   As long as steam is escaping, oil cannot force its way in.

4.   Be sure to vent by turning back an edge to allow excess steam to escape, avoiding a big burst of steam when you uncover it.

5.   All the steam will eventually escape, the liquid will evaporate and the pot will burn.

6.   Cover sides of the pan with aluminum foil, with a strip in the middle left uncovered to let steam escape.

7.   Cover baking pan with foil and punch holes in foil to allow the steam to escape.

8.   Cut several slits in the dough to allow steam to escape and brush the surface with the heavy cream.

9.   Cover pan with foil, poking a hole or two to let steam escape.

10.   Cut several slits in the top layer, in a pattern, to allow steam to escape.