[xTURBOx]

Use a timer + variable?
here is an idea

Код:

new variable[MAX_PLAYERS];

OnPlayerPickUpPickup(//)
if(variable[playerid] == 0)
{
showplayerdialog(//)
variable[playerid] = 1;
settimerex("resetvariable",10000,false,"i",playerid);
}

forward resetvariable(playerid);
public resetvariable(playerid)
{
variable[playerid] = 0;
}