Oh, that's a good question. Starscream ponders this for a moment, frowning. Then he gives a short hm, lets Frisk get a little bit further away, and strides slowly after them. (Why did he think following a creature this small was a good thing to suggest?)

"Take me to this... edge."

Maybe it's the kind of edge he can take a leap off of and fly out of this ridiculous place. He has a lot of things to do, like track down who brought him here and give them an aloof cold shoulder by ignoring them completely. And then there's the matter of Megatron. Yes, he'll be very busy figuring out what, by the Allspark, he is supposed to do with himself now.

Edge sounds much more interesting than a garden, anyway.

"...And move faster."