Started off with a bad weekend

I was on my way to the parts store to get some stuff. I was cruising along and then all of the sudden i heard a pop noise and then the car just died. Of course it lefted me stranded in the roadway until thankfully my brother got there within like 5 mins to tow me But i took it back to my dad's shop and started looking at it and i found that the wire from the distributor to the coil pack just like blew apart right at the end of the connection of the coil pack. What would cause that to happen? I just dont want it to happen again. "Luckily it was only a 3 dollar part"