2238702 Tom started mumbling. CK 1 2218207 You're mumbling again. CK 1 499541 He's mumbling something. Swift 1 2541223 Tom mumbled something in French. CK 1 31120 Please don't mumble. CK 294226 He was mumbling something. Swift 2958567 Tom was mumbling to himself. CK 259993 I heard him mumble to himself. CK 2958566 Tom was mumbling something to himself. CK 2538844 Tom mumbled something under his breath. CK