I was in a very large, crowded parking lot picking up some friends who needed a ride due to the imbibing they had engaged in...and needed to let them know where in the parking lot to go to find me.
(I had agreed to pick them up earlier in the day)
I could see people milling about in front of the building, but I was a long way off, a few football fields worth, and could not tell if they were there...and my phone was dead...dying on the last text saying I was outside waiting for them.
After ~ 1/2 hr...I decided to lit up the Thrunite TN31 on strobe. I aimed it straight up, and fired off about 10 seconds worth of fireworks.
They saw the flashing light sabre shooting into the sky off in the distance, and, well, KNEW it had to be ME....and came over.