What they do (when they're in a group, which is usually) is watch for the surge to go down, and when its lower, they cancel.
Kuna Ixtiraamaan shaqada ay hayaan ee gudaha , isla markaana waxii Taban taabo iuo taageero ah , ay si hoose oo Diblumaasiyadeed ugu gudbiyaan, cadowga hortiisana aan la isku xag xagan oo la isku jiidjiida.