Where do I need to put the closing parenthesis?

This appears to be what you're looking for?

local player = game.Players.LocalPlayer
local tramp = game.Workspace["tramp"]

while true do
    tramp.Touched:Connect(function(Hit)
        if Hit then
            wait(1)
            trick = math.random(1,2)
            if trick == 1 then
                local animation = Instance.new("Animation")
                animation.AnimationId="rbxassetid://1891421869"
                local ActPlay = player.Character.Humanoid:LoadAnimation(animation)
                ActPlay:Play()
            elseif trick == 2 then
                local animation = Instance.new("Animation")
                animation.AnimationId="rbxassetid://1977977345"
                local ActPlay = player.Character.Humanoid:LoadAnimation(animation)
                ActPlay:Play()
            end
        end
    end) -- required a closing ) here
end -- required another end here

You required a closing ) from opening it on your Connect line.

However, it's probably worth nothing that you don't need the while loop here, and having it will probably destroy your game.

edit

endtramp.Touched -> tramp.Touched from ROBLOX Studio being stupid.

You use the ) in anonymous functions. So:

pcall(function()

end)

Event:Connect(function()

end)

spawn(function()

end)

delay(4, function()

end)

Anything like that is an anonymous function, and require an end)