Bir landed on all fours, and that's when Gabriel made his move, discreetly gathering energy for what came next. Blue eyes locked laser-focused on the Kel'dor. Which seemed to give him away, but also meant he was ready. Bir went for his weapon and, a sign even if the grin and direct contact hadn't done it, and it was the Sith's arms that Gabriel was watching.
As Bir's left hand swung up Gabriel's right left his pocket to flick right, the two trading Force-borne blows. While the Sith went to pull the Jedi into the alley by the neck, Gabriel used the Force to smash his left hand into the alley wall with enough strength to break the fragile bones. Ideally it'd interrupt the Sith's concentration through injury, attempted defense, or both. Gabriel would have to directly resist the efforts on his neck if they managed to continue, but he'd rather not.
Whether the initial pull got him into the alley or not, Gabriel was entering the alley. His left hand left its pocket and settled by his upper torso, as if the jacketed limb had any real defense against a lightsaber. Beneath were his gauntlets- but the Sith didn't know that, of course, since they were covered up. His eyes sharply narrowed and he moved into the alley at a fair, short-striding jog-like pace, keeping his balanced on the approach. Both arms were up in a boxer's guard.
Well aware he was fighting a Sith and not an ordinary target sent nervous tingles down his spine, but right now all he could really rely on was his training. He was also wary of more influence on his person from Bir while he closed distance for melee.
@Tulos