A/N: Not really a prank, but an idea that I had. Hope you like it!

"Are you positively sure this is safe, Data?" Counselor Troi asked.

"I am positive," the android replied. "Would I be carrying this out if it was not?"

About twenty people were sitting around in Ten Forward in the dark. Data had had the bright idea as part of his "experiment" to turn the lights off when Guinan left, and give everyone something he called 'sparklers.'

The android turned to Troi and handed her a stick. "What am I supposed to do with this?" she asked curiously.

Data took out a lighter and lit the stick. White sparks began flying everywhere. "Wow, it's so pretty," Deanna exclaimed.

"It does produce an interesting spectacle," Data admitted.

Soon, the whole lounge was aglow with sparklers. It was quite a sight to behold.

Guinan came back into the room. "Well, isn't this something," she said. "Who did this?"

All the patrons pointed to Data.

"Well, it's very nice…"

"It is actually a 20th century technology that was used for celebrations such as Independence Days, weddings…."

"Spare us the details, Data," Guinan said in awe.

Suddenly, there was a BOOM sound and everyone turned around to see a huge flame on the floor in front of Miles O'Brien with a look of shock on the man's face. "Oops. I dropped it."

"Someone spilled some alcohol…"

Data cocked his head. "Hmm." He said. "I did not calculate this happening… I will have to be more careful next time…"