Stickybomb Grenade and "bonds are anchored"

[Nth+3]

The Entangled Condition reads, "You move at half speed, unless the bonds are anchored, in which case you can't move".

If you fail your Reflex save against a Stickybomb Grenade, are you effectively "anchored" to the floor?

The group I'm playing with is half experienced with Pathfinder and we're imagining the effects of a Tanglefoot Bag, but we're not sure if that's how these grenades work.

[Nth+3]

We decided to rule that, if you're standing on a solid surface (in this case, the floor of a cantina), then you're glued in place, but if you're standing on something like sandy soil, then you're just entangled.

[GM MacShack]

That ruling sounds about right to me.