Live imaging of BB bouncing against the posterior membrane in a latestage FP cell. wt embryos were injected with Centrin-GFP (green) and membrane-Cherry (magenta) mRNAs at the one-cell stage White arrows indicate the position of the BB at the first and last time-points. Images were taken every 5 minutes during the 18 s to 21 s stages time-frame. Dorsal view. Corresponds to Fig2D.