Overnight growth spurt

How did this happen? The last time I looked they were small and no sign of flowers. It's amazing how plants can grow overnight. It must be all the hot air in our house as they appear to thrive on neglect.

These were a present from a Fiona for having Kiara overnight while Euan had a party of 40 plus 16 year olds!!! Danny and Kiara had their own party here..