Knee Lt How Does Lt.Dan Hide His Legs In "Forrest Gump"?

How does Lt.Dan hide his legs in "Forrest Gump"? - knee lt

Have one of my favorite movies is FG.Can someone enlighten me as scenes Lt.Dan seemed to hospital in Vietnam, lost his legs below the knee down.Someone, said his legs were bent and stitches, but I do not look to see how each person that!