blue light flying sphere

it was clear evening,i was taking my girlfreind home,travelling from manila to san pedro laguna,using the intercity hiway,the traffic was not heavy but many cars were travelling on both sides of the hiway, when suddenlly i noticed some kind of light coming out of the darkness (that was a plantation  field )  at about 50 meters from the opposite side of the hiway .at first, i thaught it was a firecracker that someone has launched,but immediatly i recongnised the complete  shape as a ball.
its size should have been at about 1 to 2 meters in diameters color bright blue.the craft, as it elevated from the feild for about 30 meters move into a straight direction crossing the hiway.the distance betweent the craft and my car should have been at about just few meters. it was very clear that this craft was not man made.as it crossed the hiway,it move  for about 200 to 300 meters into the dark feild on our right side of the road.i watch it moving while i was driving. all of the sudden, craft made a 90 degrees left turn and when down into the feild.the whole scene was not more than few second.
Date and time are approximate.  PD