Last night as I was getting ready for bed, I heard a bang. I thought someone had hit the house, but thankfully, as I am sure you have guessed, it was simply one of the balloons exploding.
I went down and put the box back over the other balloon (we had already decided there was no longer a risk of explosion) and went to bed.
This is what it looked like downstairs this morning.
The orange balloon is still pretty squishy too.