// when touched, check if the agent is flying and say so.
default
{
    touch_start(integer total_number)
    {
        // we use a FOR loop here because two people can click the object at the same time.
        integer i;
        for (i = 0; i < total_number; i++)
        {
            // llGetAgentInfo returns a bitfield. Use & instead of == for comparisons.
            if (llGetAgentInfo(llDetectedKey(i)) & AGENT_FLYING) 
            {
                llSay(0, llDetectedName(i) + ", you're flying.");
            }
            
            else
            {
                llSay(0, llDetectedName(i) + ", you're not flying.");
            }
        }
    }
}