Captain Kiddo carries a canister of laughing gas which suddenly slips from her hands and hits the floor. As the canister hits the floor, the pressure valve snaps causing a pressure drop of the gas inside the canister to half of its original value. Assuming that there is no change in the volume and that the number of gas molecules inside the canister stays constant, how does the temperature of the laughing gas inside the canister changes right after the canister is dropped?