My favourite was to branch to an odd address. S0C1 and S0C7 ABENDs are common, but any S0C6 abend was mine. If an operator called at 2:00AM, I would know who caused 3 pair of socks.
Coding so that the assembler didn't flag it was needed but easy. Something like: BNE ERRLABEL-CSECT-1(BASEREG)
