This will print nothing and no errors
local plr = game:GetService("Players").LocalPlayer
local char = plr.Character
local thun = game:GetService("ReplicatedStorage").Thunder
local Tool = plr.Backpack.dash
Tool.Equipped:Connect(function(mouse)
mouse.Button1Down:Connect(function()
print("hello")
thun:FireServer(char)
print("fire")
end)
end)