When you play with a DM screen and physical dice, everyone knows when the GM is actually rolling dice because they can hear it, and it can incite anticipation, or increase a player's trust that a DM isn't fudging (ha, like actually rolling dice makes a difference, but you know.) It's all about the theatrics. In Roll20, when we make GM rolls they're silent. Is there any way to create a script that would listen for GM rolls and cryptically announce to the chat that the GM is rolling? ("The GM mysteriously rolls some dice.")