Help interpreting a Cisco network diagram from an INE workbook

I have run across a network diagram (in my INE switch workbook) that shows links between switches with a "hump" in the link.  I have never seen this before and I don't know what it means.  Does anyone know what this kind of link is?  Is it a trunk?  I know links going through a "circle" denote a port channel.

INE network diagram
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Mal OsborneAlpha GeekCommented:
MY guess here is that there was at some earlier stage in this drawing's life another connector running from Sw1 to the roter at the lower right, and this "hump" is just clarifying that it is not connected to the 3 connectors crossing it.

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I second what above has said.
I was gonna joke and say its a speed bump to throttle traffic that's going to fast :)
for clarity can you post the whole picture.
atlas_shudderedSr. Network EngineerCommented:
It could be one of those new faster than light coils where there is a small black hole at the center of the radius which gravity is being used to slingshot the electrons or photons around for an increase to throughput?

Or could just be one of those lovely Visio artifacts as first post notes.
ndalmolin_13Author Commented:
I think the first post was correct.
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