Step 1. Mention in passing to your mom something you think is "crazy expensive" and that you'd never purchase for yourself.
Step 2. Begin cyberstalking of this product the day after said comment.
Step 3. Find lowest price possible on product and place it into e-cart.
Step 4. Delete product from e-cart.
Step 5. Repeat steps 3 and 4 ad nauseum.
Step 6. Finally muster up enough balls to actually purchase product, justifying it as a "Christmas present for myself."
Step 7. Receive product and excitedly begin using immediately.
Step 8. Mention to mom that you found "an incredible deal" on said product and purchased it for yourself last week.
Step 9. Watch mom's face drop as she tells you she bought you the same thing as your big Christmas gift.
Step 10. Feel like an asshole.