Originally Posted by
Wudang
Heisenbugs. Their behaviour changes when observed.
Not sure why, but we only used that term for code issues. Start up the debugger and the heisenbug waveform collapses into proper output.
User activity seemed different somehow. We also used the term "Consultant Hands" for when a system would only work if the consultant/expert was the one "driving".
"Why did it work when you did it?"
"Consultant Hands" (make "jazz-hands" motion)