Because he had waited his entire current existence for this moment, knowing this is when he would travel through the black hole and be spit out into an alternate timeline where he would go back and find his younger self in this primary timeline to let him know he must qualify to be an astronaut so he could go to space and find this black hole so he could make sure he went back to find himself in the primary timeline so there would be no paradoxes and he could maintain the infinite loop of existence