[Bearfist]

GetPlayerName(playerid,name,sizeof(name));
if(strcmp(name,"ChuckNorris",false) == 0){
//hier was wenn er chuck norris heiЯt
else
{
SendClientMessage(playerid,COLOR_WHATEVER,"You Are Not chuck norris");
//Here A function like PlayerExitVehicle(playerid,true); I don't know what name the function is XDD
}

Hope it works ^^

Bearfist