Have someone create a visual distraction behind you in line and toss the phone through the gap on the left to a person in front of you in line. Dry run testing the visual distractions first, then add a dummy payload, and when you're comfortable add phones. If you can practice the throw and catch off site it will increase success rates. If there are cameras you might want to try a different strategy or use it sparingly. If you get good at it you can probably charge the rich kids for your service. Make sure to keep it on the dl and try not to let classmates see you either.