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Studying the 3D structure of chromospheric features like spicules is challenging with observations alone. We use MURaM simulations and a novel Hα proxy to identify off-limb spicules and on-disk rapid blue- and red-shifted excursions (RBEs and RREs) in an enhanced network region. An RBE observed at 37 km/s is driven by flux emergence and magnetic reconnection, with Lorentz forces generating pressure gradients that launch the jet. A heating front linked to this RBE propagates at Alfvénic speeds due to viscous and resistive heating. We also analyze type I and type II spicules with apparent speeds of 20–190 km/s, including a fast sheet-like feature (190 km/s) and a slower tube-like one (30 km/s). Both have RBE counterparts, and their lifetimes and morphologies match observations. All features are driven by Lorentz forces that generate pressure gradients and plasma flows. |