If you take something and divide it by nothing then it blows or in computer speak you get bus error/core dump unless the computer language handles the exception. For example, Java would produce POSITIVE_INIFINITY for (+) float and double values. If you use integral values then you'll get a convienent blowup exception.
So, this thread is POSITIVE_INFINITY or it basically blew up depending on whether it was an integral valued thread or 32-bit or larger floating number.
But, maybe this thread should be promoted to C++ where it can have multiple parents. Then it's a multiple parented blow up. Ooh, that sounds better.
But, then Java can have multiple interface implementations even though it can only have one parent. So, it can be a multiple interfaced blow up.