In almost a heartbeat or two......
Nothing seems to have happened.
"Uhhh, Dad?" Billy said. "Nothing seems to be happening."
"Oh, but it is happening." Nigel said. " I set the tf to be gradual, so that as we hike, we'll slowly turn into monsters."
"I see." Billy said. "We're gonna be turning into monsters during our hike. That's amazing."
"It is, Billy." Wilma said, "but," he said anxiously to her husband, "what if anyone..."
"Don't you worry, honey," Nigel said. "I set the tfs for all of us so that only we see us 3 tfing into monsters, and that only we see ourselves as monsters. Other people who we pass will just see us as humans."
"You certainly did think of everything, Dad!" Billy said.
"Yes, yes i did." Nigel said. Almost immediately, Nigel's ears pointed, almost becoming bat-like.
Nigel admired his new ears in the car wing mirror. "It's official." He said. "Our monster transformations have officially begun. Now let's go hiking!"
With that, the family walked off to start their hike, and their monster transformations too.