[He doesn't want to resort to picking her up and carrying her away from the park; even if he can explain to onlookers that there's a giant beetle that could kill her right behind them, it would look awful for everyone. But it might just have to happen if this continues.

Holding onto her shoulder lightly to make sure she doesn't escape, he glances at the other people in the park. Most of they are lying down or playing Frisbee with no reason to watch the trio screaming at each other. Then there are the joggers on the road below that don't glance up. It's unnatural, sure, but they shouldn't run and grab random people on the street to help out. This requires an expert.]

...Most people don't pay attention when they don't have to. Give it enough time. [Maybe.] Better that no one else startles it, or whoever we call will have a harder time catching it.

[Times to pull out that phone and search for whoever the hell could deal with this. Exterminator? Bug experts? How are they listed?]