Perry was good about staying out of the way. He couldn't exactly HELP force open a time machine without exposing himself, but if this somehow activated it he didn't want the boys caught without him.

The platypus lingers, one eye rolling in Ratchet's direction as he approached. Well, good, maybe HE could help keep the boys out of trouble. The last thing Perry wanted was the boys to start time traveling and do something that would result in evil ruling the world...or something ridiculous like that.