2PM's Jun.K, Nichkhun, and Wooyoung recently showed off some pictures of what can only be described as a rollicking good time in Japan.

The trio can be seen enjoying themselves at the Universal Studios complex in Osaka, indulging a little bit of fun in the middle of their Japanese activities. "Going back to our childhood for a while with me, Wooyoung, and Nichkhun," Jun.K posted, along with a slew of other pictures.

It sounds like the trip was a blast - how do you think they would've responded to riding a big, scary roller coaster?

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Tip: Paula