You manage to stop just before the thing hits you.
That was really, really close! Whoever threw this thing must have very good aim.
It looks like a spear. You wonder who could be targeting you?
Nino: Realize that the monster chasing after you is HOT.
Before you could dismiss attempting to follow such a silly command, Five brings your attention to something.
Something red, pointy, and also above you. Again.
Nino: Look up. Again.
Is that...
Nino: Take a closer look.
Yeah, that's another spear. A REALLY fast spear.
Oh dear god.
Aria: As a show of trustworthiness, shoot whatever it is in the sky with your bow so that Nino won't get hurt.
- Aria: Take Ludwig and the little kid and go hide!
- Nino: Wait, what?
- Nino: What are you doing?
- Aria: I'll buy you some time, so go!
- Aria: Hurry, get going!
- Nino: But...
- Nino: What about you?
- Aria: That doesn't matter!
- Aria: Just trust me and do what I said!
note: go to the beginnings of introducttions for items.
tl;dr: Nino stops before the spear can hit him. A prompter tries to do a horny (bonk), but Five sees another spear. To establish trust, Aria harnesses her inner Robinhood to deflect the spear with her bow.
A guard throwing spear at human on a bridge? Is that a UNDERTALE REFFERENCE?!