ðə spɹˈɪŋ ɪz ɹᵻtɹˈæktᵻd ˌɪntʊ ðə dɪvˈaɪs wˌaɪl ɪɾ ɪz ɪnðɪ ˈɛɹ ɪn ˈɔːɹdɚ tə bˈɛnd ðə lˈɛɡ ænd bɪɡˈɪn stˈoːɹɪŋ pətˈɛnʃəl ˈɛnɚdʒi.
The spring is retracted into the device while it is in the air in order to bend the leg and begin storing potential energy.