All of this. For a tighter move while carrying some speed, like a fairly quick u-turn, I will stay clipped in but sit up for the turn. For slower speed tight maneuvers, such as moving through narrow entrances, around bollards, or through people on foot, I will shift into an easier, spinnable gear, unclip my left foot--the foot I put down at stops--and pedal with my right foot. If it's a mellow enough moment, I'll stay reclined. If it's a bit more complicated, I'll sit up too. Like so many things Cruzbike, this seems like a lot to remember at first, but after a while it becomes instinctual.