Search Youtube for venting battery. A lot of the results include venting batteries in mechanical mods. The battery and your whole mod will get really hot before anything really violent happens (as long as you mod has at least one vent hole, else it will blow because of pressure build-up). If your mod gets really hot, let go of the fire button, put it down on a safe surface or throw it out the window and walk out for a few minutes.
To calculate the safety of your setup, you need basic knowledge of ohm's law:
Know what is the max steady amp output of your battery. I believe you mean the Sony VTC4. That one is 30 amps max. when the battery is in contact with a "charge", or coil, the output voltage is 3.7 volts. Divide 3.7 volts by your minimum 0.6 ohm coil and you get 6 amps, way lower than the battery's max output. If you want to be paranoid about it, let's say the battery still outputs the 4.2 volts you read when it is not in use: 4.2/0.6 = 7 amps, still way lower than the battery's 30 amp max.
THE OTHER POINT NO ONE EVER TALKS ABOUT: It is very important to know when your battery has reached it's minimum charge since this is a lithium-ion battery. As you vape, the battery's voltage will go lower. When the battery is measuring under 3 volts it is in real need to be recharged. Depending on the batteries, the lowest you can reach is 2.8 volts on a lithium-ion battery that is not connected to other than a volt meter. If your battery discharges lower than that, it will definitely not perform as well and will not last very long. Make sure you have a decent enough charger too.
I hope I am not overloading you with information or scaring you... change your batteries frequently enough and it will be safe to bring your mod to your lips. Batteries that vent are just brought to their limits and with a VTC4 on more than 0.5 ohms, the numbers are definitely on the safe side.