carried out a thorough analysis of a jet observed in Ca II in the vicinity of an active region, and found multiple signs of the untwisting dynamics of the chromospheric jet. @Tian14 studied a sample of chromospheric events with the IRIS instrument [@DePontieu14b], and noted obvious transverse motions as well as line broadenings that they attributed to the existence of twist and torsional Alfvén waves. At the photospheric level, there is accumulating evidence that a large fraction of spicules present twisting motions [@Sterling10b; @Sterling10a; @DePontieu12]. The recent IRIS data indicate that twisting/torsional motions are extremely frequent within the chromosphere and are associated with spicules @DePontieu14a. At even smaller scale, beyond the resolution of imaging instruments, the spectrum of explosive events can also be interpreted as arising from the fast rotation of magnetic structures [@Curdt10; @Curdt11].

Although all these events develop in environments that exhibit substantial differences in temperature, pressure, plasma density, and even level of ionisation, some common characteristics are certainly shared between the jet-like structures. The idea that some common mechanism is triggering and/or driving some of these different classes of events has thus naturally developed [@Shibata07; @Moore13; @Cranmer15]. The present study builds on that idea by aiming to 