Refillable reservoirs and a miniature fog maker with shock protection surrounded by a layer of lead and plastic for correct mass, with small holes to let the fog seep out.
Either that or a slot for dry ice.
A pool table, rather like an air hockey table, also with a fog maker.
The table is turned
on, and the fog starts to seep out of the table and snooker balls. It gathers in the table, making a thick white layer, a few inches deep, opaque and dense. The man picks a cue, gazes through the shroud of fog, and breaks.
The balls speed apart, leaving gaps in the fog in their wake, which fill in, like fast silly putty. The 11 hits the corner pocket, and drops from view.