The eternal Tom and Jerry dynamic, but make it programming. You spend hours wielding your debugging hammer with murderous intent, convinced you're about to smash that bug into oblivion. Meanwhile, the bug is just casually chilling on your hammer, completely untouchable and probably laughing at your futile efforts. The more aggressively you debug, the more the bug seems to mock your existence from its safe perch. Classic case of looking everywhere except where the problem actually is—usually a missing semicolon or an off-by-one error that's right in front of your face.