I was getting on the bus and immediately heard an extremely loud male voice. Paid my fare and spotted the culprit about halfway down the aisle ranting and waving his arms as he let loose into his phone. I walked up to him, didn't say a word, leaned over, raised my finger to my mouth and gave him a "SHHHHHHHHH" His seatmate laughed out load and a few others gave me a round of applause. Oh, and the loud talker lowered his volume. Feel good about diffusing a loudmouth without saying a word.