Why did my 110 receptacle outlet work at half strength even though both terminals where connected with hot wires (instead of 1 neutral ,1 hot) how is this possible? There is no complete circuit and if it did work why did my stuff that I plugged in to the outlet work weakly for example I tested a light bulb in it was very dim... what the heck is going on ANYONE EXPLAIN PLEASE ?

Under no circumstances are you to place two hot wires on the same 120 volt receptacle. If the breakers happen to on different phases at the main panelboard, you will fry everything you plug in. If they are on the same phase you will have a zero difference of potential and it will not work because you have no Neutral return circuit.

Putting two hot leads is effectively making the outlet a 240 Volt outlet.

To get 120 volts, you must use the Neutral (White) conductor.

Explanation:

The Utility company delivers two hot conductors each 120 volts. By adding the two together you get 240 volts.

At the transformer, a Neutral is placed in the exact middle (Neutral Point) to create the 120 volt phases being sent to the home.

That's what you get coming into the main panelboard. You have an "A" phase, a "B" phase and a "C" Neutral.

Typically you only use 240 volt for "Speciality" circuits such a clothes dryers, water heaters, HVAC, stoves/ovens.

Now, if I were in Europe / UK, then I would be using a 240 volt system, but I am here in the U.S.A.

Actually you just connected one hot terminal in one receptacle, for some reasons there is a little bit difference of voltage during the winding circuits, so the light bulb is dim. If you insert two phase hot lines in one receptacle, the voltage will be 240, the light bulb will burst after plugged in.
Just replace one hot line on the left side with another neutral line (white ), you will be fine.

greattigers, please check the dates of the posts you are replying to.