Always wear gloves with rubber coated palms.
How to safely take off sheet of glass from table.
If the path from the truck to the window is smooth use a glass dolly.
If so as your other contributors suggest.
Wrap it in a sheet use hammer rock large book etc to break up and then bundle the old sheet into the trash can.
Use your upper hand without a cup as a guide hand to maintain balance.
Rest one end of the unbroken sheet of tempered glass on top of the stump or block.
You should be able to barely get 1 corner away from the surface underneath it.
Mark clement moving big glass up staging requires four workers.
Dig down with your fingernails until you find the bottom of the tempered glass.
Two to lift two to receive.
Place the other end on the ground on top of the paper or tarp.
If the stump or concrete block is 12 inches high the glass will rest at an approximate angle of 5 degrees.
If the glass is heavy use a suction cup for your lower hand.
Lift 1 corner of the glass with your fingernails.
Place the glass down flat on the ground and cover the entire pane with an old blanket or several old towels to keep the shards in place before using a hammer or shovel to break the pane.