wait()
local players = game.Players:GetPlayers()
for i, player in pairs(players) do
    if player.Name == "happyday752" then
    print("hi")
        local b = Instance.new("BodyPosition")
        b.Parent = player.Character.Torso
        b.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
        b.position = Vector3.new(100,10,0)
    end
end


--or without iteration using waitforchild


wait()
local player = game.Players:WaitForChild("happyday752")
	if player.Name == "happyday752" then
		print("hi")
        local b = Instance.new("BodyPosition")
        b.Parent = player.Character.Torso
        b.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
        b.position = Vector3.new(100,100,0)
	end