I always imagined boats were only launched by slipping gracefully down a slipway stern end first, perhaps after a bottle of champers has been broken over the bow. Apparently not. Rather undignified isn't it.
Of course some are still launched the traditional way, but oh dear, there are days when things just don't work out in spite of everyone's best efforts. Note the bloke in the orange hard hat. After applauding, with great complacency he looks away, confident of a successful launch. He looks back I expect just in time to proclaim, oh bother.