An astronaut could possibly get emotional, however, this would result in large water orbs inside the spacecraft that can suffocate anyone inside because of the zero gravity. The astronauts can get can ebullism, hypoxia, hypocapnia, and decompression sickness, which are all life-threatening. Lastly, the ship could easily collide with an asteroid or astronauts can die of toxic gases and space dust while walking on the moon.