pranks

So I'm sitting at the bagelshop on my day off because the artic wind has finally come down so it's really cold, and being the cheapskate I am, my apartment is also rather chilly. But the real reason I chose to come here of all places is that I am attempting to prank my mom. She's not particularly tech. savvy, so I've taken great pleasure in spending my morning learning how to make my own ringtones. I currently have a ringtone of Tardy for the Party waiting for her, and I'm going to assign it to Morgan so that we can call her when all the bagel girls are at dinner tomorrow night. It's only fair that we all get to partake in the joy of seeing her shocked and horrified face, right?
But of course, since it's so cold, as soon as get here, she grabs her purse(cell phone inside) and goes to let the dogs out since she can't leave them outside. She better get back soon, because I want to make sure I get her all taken care of, and my computer battery is draining quicker than I would wish.
I'm also trying to determine more such pranks to play, because I'm having far more fun than I should doing this. And it's far more fun, and more successful than trying to figure out what to get her for Christmas. I've been scrounging for ideas all month, and still nothing! So if anyone has ideas for either, let me know!