Back home, when I was a kid, dinosaurs roamed the hills behind our house. The Experiment opened up a couple of portals and dinosaurs in Helsinki was one of the strange occurrences.
They spooked easily and typically stayed away from humans like the plague. Some of the theories said that this was a portal to a dinosaur-and-human world. Like, the dinos stayed clear of us because they'd learned a long time ago that humans were bad news. Seemed plausible, I suppose.
Whatever it was, an airhorn was typically enough to scare away a whole herd, so there were two on every shirt and pair of pants I wore. Lots of kids were dressed like that by our moms. The dads shook their collective heads, though quickly stopped when the glares shot in their direction.