back-end-end of the swing back to the board.

back-end trick-trick with no first position; the position is not performed
until the height of the swing back to the board.

belt (safety belt, spotting belt)-safety belt that they flyer wears around waist when learningnew or practicing more dangerous tricks. Safety lines are attached to loops on both sides of the flyer's belt (some belts used e.g. by swinging trapeze performers during shows have only one ring and a single safety line is used).

board (platform)-wooden take-off platform at one end of a flying trapeze rig. Some rig configurations have two platforms (one at each end).

board biscuit (board bisket, board bunny): person who works on the board.

bullet drop-a straight drop down to the net, flat on the back, often with arms crossed over the chest