Only allowing 'unpause' keyboard events while paused

js/reveal.js

@@ -1480,6 +1480,11 @@ var Reveal = (function(){
 
 		var triggered = true;
 
+		// while paused only allow "unpausing" keyboard events (b and .)
+		if (isPaused() && [66,190,191].indexOf(event.keyCode) === -1 ) {
+			return false;
+		}
+
 		switch( event.keyCode ) {
 			// p, page up
 			case 80: case 33: navigatePrev(); break;