I STRUCK OIL, GAS, Oh No JUST A SINK HOLE!

That's right When I drained my pool there was about 2 to 3 inches of water standing in the back yard. We noticed in 3 different places water boiling out of the ground... The next day I walked over and noticed this hole 8 inches in diameter and about 5 feet deep... So I step closer and fall in, well not all of me just my right foot. The ground is caving in so the city is coming out in a few minutes to check it out and make sure there are no underground monsters (Tremors)!