1.   Everything went according to plan until moments before touchdown when, for no clear reason, one of the crew engaged the four nose-mounted retro rockets.

2.   It would then employ retro rockets to slow down as it re-enters the atmosphere.

3.   Retro rockets will fire to slow the Space Cruiser for re-entry.

4.   When I declare the floor open for discussion his hand shoots up like his retro rockets have just fired.