Lay down a t-shirt on a flat surface with the neck to your right side and the bottom to your left.
Draw an imaginary line vertically across the middle of the t-shirt.
With your left hand, pinch the t-shirt on the imaginary line few inches away from the bottom edge.
Draw another imaginary line going horizontally across the pinched spot to the shoulder seam.
With your right hand, pinch the left edge of the imaginary line to get both the front and backside of the t-shirt.
Bring the pinched shoulder seam to the top of the t-shirt, while hanging on to both left and right hands, and grab both side of the t-shirt.
Keep firm grip on both pinches and uncross your hands while lifting up the t-shirt. The t-shirt should be hanging from your pinched spots leaving the other side loose. Shake out the creases if necessary.
While lowering the t-shirt back into the flat surface, fold the loose sleeves under the rest of the t-shirt making the side symmetrical with the pinched side.