Possible Clues:

• Silly chatter is what you expect from melodramatic people
• Emotional behaviour of cast with their acting
• Emotional reaction shown by rich state in transition
• Tantrum techniques, say
• Typical ham feature
• Histrionic behaviour is chatter of a kind
• Articles on special effects, say, for putting on a show?
• Smash hit recast for performance
• Flamboyant lawyer's indulgence
• Histrionics