You do not need to be Superman to bend or curve an acrylic sheet. The simple use of a heat gun will do. This device, which resembles a hairdryer, but tremendously more powerful, releases hot air and steam. It is often used in construction or in art to weld plastic, heat freezing liquids, cut thin but dense sheets of wood or plastic, and strip paint. Using a heat gun to bend acrylic should be done only by a professional.
Mark the acrylic sheet with a pencil at the point you want curved.
Put the acrylic sheet on a sturdy squared base, with the line you drew on base's edge. A sturdy base can be a cement block or desk for example.
Turn on the heat gun and approximately 10 cm (4 inches) away point the device moving slowly across the line you drew up. The other person will bend the acrylic very slowly as the gun begins to heat the sheet. Only one side of the sheet will need to be heated.
Twist and bend the sheet very slowly to achieve the desired curve, then remove the gun to allow the sheet to cool. The time it takes to curve the sheet will depend on the thickness and quality of the acrylic. Use of a fan or cold water will expedite the cooling process.