What is the deduction for a Level 5 floor back tuck if the gymnast fails to extend/open prior to landing?

The deduction for a Level 5 floor back tuck when the gymnast fails to extend or open prior to landing is 0.20. This is based on the level of precision required in gymnastics routines. When a gymnast performs a back tuck, it is essential for them to exhibit a proper technique, which includes opening and extending before the landing to demonstrate control and readiness. A failure to do so reflects a significant error in execution, meriting a deduction. This particular deduction signifies that the lack of extension compromises the gymnast's safety and stability when landing, thus warranting a more substantial penalty than smaller errors such as a slight balance issue or less significant form breaks. The specific factors contributing to the evaluation of such skills in gymnastics align with maintaining rigorous standards for performance quality at this level.