Daya daga cikin mafi m mutane a cikin jerin talabijin "Matattu masu tafiya" sun faru ne a tsakiyar shekara ta takwas, lokacin da Karl Traas da ya bushe aljanu. Wannan asarar ta warware masu magana zuciya da kuma tayar da fushin masu kirkirar halitta, saboda a cikin abin kwaikwaya wannan halin ya mutu har zuwa ƙarshen. Ba wai kawai magoya baya bane kawai suka yi mamakin, har ma da wasan kwaikwayo na dan wasan kwaikwayo sun yi sallarsa a cikin hoton Karl har yanzu shekaru 11. A cikin wata hira, wannan a cikin tsarin Wizard Duniyar 2020 na, Riggz ya ce bai yi nadama ba game da "matattu da suka mutu," amma har yanzu ban kwana ba ne a gare shi:
Kasance mai gaskiya, kasancewa cikin wannan wasan kwaikwayon shine kwarewar da ba makawa. Wannan shi ne abin da na sani, kuma yana da wuya a bar shi, saboda ina fatan komai zai ƙare daidai yadda ta juya. Duk da wannan, na riga na ƙasƙantar da abin da ba shi da wannan wasan kwaikwayon. Yanzu akwai wasu haruffa a cikin goshi, kuma na riga na sami damar yin wasanni da yawa daga cikin kanku. Bayan shekaru takwas, wannan ba sabon abu bane a gare ni.
Kamar yadda kake gani, Riggz ya yi cewa ba shi da lokaci mai yawa don shirya don kulawa. Dan wasan da ya samu game da mutuwar mutuminsa a lokacin rehearsal na jerin na shida - ya kasance a cikin wannan taron Karl ya zama wanda aka azabtar da shi a cikin jerin na takwas). Duk abin da ya kasance, yanzu Riggz yana jin "abin mamaki mai sa'a" saboda gaskiyar cewa yana da damar zama ɗayan taurarin matattu.