I was at The Venetian waiting on my pax, After 6minutes I cancelled the trip. As soon as I cancelled the trip a tall guy wearing black short and black shirt shaved head with facial hair kind of ISIS looking showed up and banged passenger side of my window 3times.....he also tried to open my car doors. My doors were locked. windows all the way rolled up. On my left I have my hand gun loaded hide away from public view I could touch it if I wanted it....this thing took place about 1PM..that guy walked away from my car I didn't say anything to him nothing at all. People lock you doors. Roll up all your windows. If you cancelled the trip drive away from the area and also turn off your app....if pax tried to talk to you or stop you do not respond to them just keep on moving, . .....do not answer for calls.I stayed there b/c I had my gun with me. some people will pick a fight with you for $3.75. or try to do damage to your car.