// if non-number, do not draw it
if (n == 1994)
    return 0;

//
// Display level completion time and par,
//  or "sucks" message if overflow.
//

…

    else
    {
        // "sucks"
        V_DrawPatch(x - SHORT(sucks->width), y, FB, sucks); 
    }

      case 141:
        // Silent Ceiling Crush & Raise
        EV_DoCeiling(line,silentCrushAndRaise);
        line->special = 0;
        break;

So many switch statements