[Jacob's happy to help out with power demonstrations like this, even if the whole vibe of fanport sometimes weirds him out (why do so many people care about their love lives). It's a good way to make ordinary people happy, and for Jacob, his powers are fun.

He definitely looks like he's having fun when he wraps himself in a shimmering purplish biotic barrier as he addresses the crowd.]

Different biotics have different specialties. I'm not as strong on the offense as the Major here... but my barrier can stand up to a rocket hit and keep me safe. And protection like that can save lives in combat.

[He nods toward Kaidan.]

Care to help me demonstrate, Major?

[If Kaidan ever wanted an excuse to throw something at Jacob, this is his chance.]