Generate a question about the following movie plot: One fine spring afternoon, Joe (Daniel Craig) and his girlfriend Claire (Samantha Morton) get away for a romantic picnic in the countryside near Oxford. Joe pauses before he surprises Claire by producing a bottle of Dom Perignon. The moment appears portentous, but before Joe can pop the cork and say whatever is on his mind, a huge red hot-air balloon drifts onto the field.A young boy cowers in the basket of the balloon which is being dragged along the ground quickly while an older man, his grandfather, trails behind, pulling on one of the ropes and urging the frightened boy to jump out. Joe races to assist, and he is joined by several other men coming from all directions. It looks like they've got the situation under control, but before the boy can climb out of the basket, the wind picks up, setting the balloon suddenly aloft; the men hang on reflexively. As the balloon rises higher and higher, four men let go one by one, tumbling safely to the ground. They recover from their panic only to realise that one man never let go and is now dangling from the end of a rope hundreds of feet in the air, the balloon still rising and floating away from the field. The group watch in helpless horror as the man finally loses his grip and falls to his death in the distance.While the onlookers all gape in shock, Joe, rational and practical to a fault, decides to walk over to where the man fell and see if anything can be done. One of the men from the group (Rhys Ifans) follows behind him. A grisly sight awaits Joe and the other man, and it is immediately obvious that the man who fell is quite beyond assistance. The man who tagged along suggests that Joe pray with him. Joe resists, grumbling that prayers won't help, but the other man pleads with him until he finally kneels down. Eventually the authorities arrive and everyone leaves the tragic scene.Shortly afterwards, Joe and Claire are dining at the home of their married friends Robin (Bill Nighy) and Rachel (Susan Lynch), retelling the story of what happened on that fateful...
The answer to this question is:
Who stabbed Claire in the belly?