A length of biohazard warning tape to cordon off dangerous parts of your
map. The model comes with 1 skin and 4 animation sequences. The first
sequence is a static pose. The second is a gentle bobbing animation with
both ends of the tape secured. The third is a more vigorous animation
where one of the ends has broken free. The fourth is an animation where
the tape falls to the floor.
Although in theory warning tape is for warding people off, the bright
colour and motion will actually attract the player’s attention and can be
used in maps to highlight important areas. The first 3 poses animate
automatically, just place the model in your map as desired. The falling
sequence needs to be animated manually. You could trigger it when the
player touches the warning tape, but that might betray the L4D roots of
the model a bit too strongly. Alternatively use the final frame as a
static pose. Either way, place it 8 units above the floor.
I’ve included the gmax file with the model, because it has some unusual
animation tricks. The one which makes sure the polygons lie flat on the
ground without intersecting it is particularly useful: it combines a
“Volume Select” modifer to dynamically capture any vertices which stray
below the floor line with an “XForm” modifier that applies 0% vertical
scaling centred on the floor level.

Cool one, cheers!
Have a look:
What do you think?
A post to hold the tape would make sense..
but hey :)
I feel much safer seeing the warning tape up. And yes, it needs something to fix it to, but including it in the model would be a bit too restrictive – much better to have the really static bits be made from brushes in this case.
Safety first!
More elaborate Screenshot: