..says you can "knock an opponent prone in melee combat if you roll a triumph" but cant you do that if you roll a triumph even without this Talent?

Thanks!

Only with Brawl attacks, as they have the Knockdown quality (p211).

Ahh thanks for that!

Getting knocked down by a lightsaber sounds painful

Indeed! Isn't a mere 3 Threat/advantage enough to knock prone? I've been ruling that the benefit is IN ADDITION to the normal effects of a Triumph

Getting knocked down by a lightsaber sounds painful

I'd like to be in a situation where I can declare to the GM, "I try to knock him down... prone... to the ground... with my lightsaber. Just a light tap."

Indeed! Isn't a mere 3 Threat/advantage enough to knock prone? I've been ruling that the benefit is IN ADDITION to the normal effects of a Triumph

3 threats will make you fall prone, although - as far as I can remember - 3 advantages will not knock your opponent prone, but it will disarm s/he/it.

Indeed! Isn't a mere 3 Threat/advantage enough to knock prone? I've been ruling that the benefit is IN ADDITION to the normal effects of a Triumph

3 threats will make you fall prone, although - as far as I can remember - 3 advantages will not knock your opponent prone, but it will disarm s/he/it.

+1

What Jeger said. There's also a critical hit that causes the target to fall prone.