 A viscoelastic jet breaks up much more slowly than a Newtonian jet.Typically, it evolves into the so-called beads-on-string structure, where large drops are connected by thin threads.The jet widens at its base (reverse swell phenomenon) and folds back and forth on itself .The slow breakup process provides the viscoelastic jet sufficient time to exhibit some new phenomena, including drop migration, drop oscillation, drop merging and drop draining.