An unauthorized hot tub installation had nothing to do with a couple who donated $15 million to  University of Michigan Computer Science Engineering building.

It appears to be a PRANK!  The hot tub appeared one night and disappeared shortly there after.

“People were kind of flabbergasted,” CSE spokesman Steven Crang said of the hot tub, which had a wave of visitors Sunday and Monday. “It was obviously unexpected. It was pretty creative and now it’s gone. It left a buzz in its wake.”

How Did That Hot Tub Get Here?

Crang said the group of students responsible is still a mystery.

“It’s apparently people who are close to the department because they were able to gain access to the building and install the tub,” Crang said, adding that the installation was likely difficult. “The thing that intrigued everyone was that it was on the fourth-floor balcony. It’s a large hot tub and the doors that lead out to the balcony are not real big, so they had to do some work to get it out there.”

The hot tub, first reported by The Michigan Daily, sparked a wave of conversation between U-M students on social media, including a thread on Reddit.

“I am in the dude (Duderstadt building) right now, will walk over and check it out here in a few minutes and report back,” Reddit contributor fuzzball90 wrote when word of the hot tub first appeared online, later reporting: “It’s legit. Working hot tub.”

“Can … can I study in it? I’m not CSE,” asked another contributor.

“I don’t see why not. I spent an hour in there earlier and I’m Mechanical,” fuzzball90 responded.

Images of the hot tub appeared on imgur. That gallery has nearly 144,000 views.

So what did Bob and Betty Beyster think of it?

“They found it amusing,” Crang said with a laugh.