Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (1,1) content-size 798x121 [BFC] children: inline
    frag 0 from BlockContainer start: 0, length: 0, rect: [2,2 168.96875x119] baseline: 16.296875
    BlockContainer <body> at (2,2) content-size 168.96875x119 inline-block [BFC] children: not-inline
      BlockContainer <div.hmm> at (3,3) content-size 166.96875x17 children: inline
        frag 0 from TextNode start: 0, length: 21, rect: [3,3 166.96875x17] baseline: 13.296875
            "suspiciously tall box"
        TextNode <#text>
      BlockContainer <(anonymous)> at (2,121) content-size 168.96875x0 children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x123]
    PaintableWithLines (BlockContainer<BODY>) [1,1 170.96875x121]
      PaintableWithLines (BlockContainer<DIV>.hmm) [2,2 168.96875x19]
        TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [2,121 168.96875x0]
