Nobody objected to Jake's decision, Sarah even had the same objective as him. Kyle looked like an exhausted worker coming home to find that someone had crapped on his bed. He had just realized that he may have been a little too hasty in merging his genetic code with the Myrmidian Bloodline.
Indeed, he was progressing faster as long as he was doing something he could be proud of and his body was gradually exceeding its former limits. The problem was that he was more conflict-seeking and had an irresistible urge to compete with everyone.
With his rather selfish and cautious character this didn't really mix well. If he refused or was defeated, he could even pay dearly for it.
Anya called a taxi, yes a taxi, and a yellow car with the appearance of an alien racing but covered speeder stopped next to them, floating a few dozen centimeters above the ground. It was only then that Jake and the rest of the group realized that they had really joined a "new Earth".