Rigged

The last 10 minutes could be said to be the slowest time of Shi Tian's life. 

Time went by so slowly– even topping the time that he was forced to stay in his course where a professor would blabber on nonstop.

"Has the device finished warming up yet?" Stopping at a somewhat climax point of the storytelling, Shi Tian enquired if the device finished warming up yet.

"It's not done yet," Mary didn't even bother to check if the device was warmed up and gave her answer rather bluntly.

Of course, Shi Tian was a cautious person, and given his personality, he suspected something was amiss here.

"Hmm, let me check the device actually." Shi Tian extended his hand and demanded. 

"You've said the device was warming up, but I've never actually seen it with my own eyes. So please, let me see it." He added, prompting Mary to go defensive.

"No, this device is mine and I won't allow anyone to touch it." She refused and gave her explanation.