Sounds like the old 'bouncing betty' or 'squadbuster' grenades.
Not very impressive devices in reality.

http://uk.youtube.com/watch?v=F6A-itiD0-w&feature=related

There used to be a few trip wire triggered 'mines' available. The
'playmore mine' was one. On being triggered it fired a plume of
paint , hopefully onto the target. Never seen one but there are
websites out there which will how you how to make something similar.
Or, if you have money to burn, there is this;
http://www.warpig.com/paintball/technical/alternative/mark_30/index.shtml

On Jan 22, 5:12 pm, "[email protected]"
<[email protected]> wrote:
> Probably. I didn't understand what he was saying.
>
> On Jan 21, 12:36 am, Mike Måne <[email protected]> wrote:
>
>
>
> > Well, water can't really compress....Perhaps he/she was suggesting a
> > mechanism like Super Soakers using air pressure to spray the liquid. It may
> > help, but also would dilude/thin the paint with additional water.
> > -
>
> > On Tue, Jan 20, 2009 at 10:46 AM, [email protected] <
>
> > [email protected]> wrote:
>
> > > Apparently there is a new paintball grenade that uses a small water
> > > tank that bursts and makes the paint expand and pretty much explode
> > > everywhere. I don't see how that would work and I can't find it
> > > online. It was a mate that told me about it.
>
> > > On Jan 18, 7:28 pm, Mike Måne <[email protected]> wrote:
> > > > Yes, they are like giant tank caltrops. By the way, has anybody built a
> > > > landmine actually used in a tank battle yet? That would be an 
> > > > interesting
> > > > field to consider.
> > > > -
>
> > > > On Sun, Jan 18, 2009 at 3:55 AM, [email protected] <
>
> > >  > [email protected]> wrote:
>
> > > > > Hedgehogs are annoying on xbox games. You try blow one up it just tips
> > > > > over.
>
> > > > > On Jan 18, 1:00 am, "Derek Engelhaupt" <[email protected]> wrote:
> > > > > > Sorry, "bracked" was supposed to be "bracket".  Detailed plans on 
> > > > > > how
> > > > > > to build one in 1/6 scale:
>
> > > > > >http://www.euronet.nl/~idi_bark/
>
> > > > > > Derek
>
> > > > > > On Sat, Jan 17, 2009 at 6:50 PM, Derek Engelhaupt <[email protected]>
> > > > > wrote:
> > > > > > > "Industrially manufactured Czech hedgehogs were made of three
> > > L-shaped
> > > > > > > metal brackets (L 140/140/13 mm, length 1.8 metres (5 ft 11 in),
> > > > > > > weight 198 kilograms (440 lb); later versions: length 2.1 metres 
> > > > > > > (6
> > > ft
> > > > > > > 11 in), weight 240 kilograms (530 lb)) joined by sheet metal,
> > > rivets
> > > > > > > and bolts (or, later in the war, welded together) into a
> > > > > > > characteristic spatial three-armed cross."  - according to
> > > Wikipedia.
>
> > > > > > >http://en.wikipedia.org/wiki/Czech_hedgehog
>
> > > > > > > Scale length for each bracked would be 13.83" for the later
> > > version.
>
> > > > > > > Derek
>
> > > > > > > On Sat, Jan 17, 2009 at 3:55 PM, Joe Sommer <[email protected]>
> > > > > wrote:
>
> > > > > > >> On Jan 17, 4:32 pm, [email protected] wrote:
> > > > > > >>> Could you tell me what is the length of the 2*2 members that 
> > > > > > >>> make
> > > the
> > > > > > >>> hedgehogs?
> > > > > > >>> They look quite long , about 16inch Im guessing from the 
> > > > > > >>> picture.
> > > > > > >>> with an average tank ground clearance of 2-4 inch why do they
> > > need to
> > > > > > >>> be so large?
>
> > > > > > >> Ask Mr. Tyng.
>
> > > > > > >> The Marlows actually anchor them into the ground with steel rebar
> > > (no
> > > > > > >> kidding).
>
> > > > > > >> Joe
>
> > > > --
> > > > -Mike Måne @http://moonrcprojects.googlepages.com
>
> > --
> > -Mike Måne @http://moonrcprojects.googlepages.com- Hide quoted text -
>
> - Show quoted text -
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