Kammala wannan jumla: Wallace ya fara wasan tsere a lokacin da yake matashi, bayan yawon shakatawa na makaranta. Bayan ya yi aiki a kan gangaren wucin gadi, ya shiga kungiyar wasan kankara ta Southampton. Wallace ya zo na biyu a gasar tsere ta kasa da kasa ta matasa. Wallace ya yi gasa a gasar cin kofin duniya ta FIS Freestyle Ski tsakanin 1981 da 1989. Ya gama a cikin manyan 10 a wasanni 22, kuma a wani lokaci ya kasance na shida a duniya. A cikin 1984, Wallace ya shiga cikin wasan tsere da wasan acrobats a Cibiyar Nunin Earls Court. Wallace ya zo na shida a cikin hadin gwiwa a
1986 FIS Freestyle Gasar Zakarun Duniya. Wallace ya yi gasa a wasan kwaikwayo na wasan motsa jiki na freestyle a gasar Olympics ta 1988. An dauke shi daya daga cikin wadanda aka fi so. Daga baya a wannan shekarar, ya sami rauni a cikin haɗin gwiwa a yayin wani taron a Cibiyar Nunin Earls Court, wanda ya sa ya yi makonni shida. Abokin wasan Mike Whealey ya sami rauni a wasan.