He's hoping to start studying in the Fall, and has been taking some courses - Thursday night is the one time he is sure he will not have a problem serving on the ambulance squad. The woman who schedules the volunteers set him up with a driver named P. They had several calls a few weeks ago - some resulting in their taking people to the hospital.
As they drove back, they talked. As they talked, they realized that each looked familiar to the other. Turns out, P. is in Elie's Reserve unit, was there over the three weeks they had Reserve Duty this summer and was scheduled for this one day course.
Last night, the army called him. The course is a very expensive endeavor (more on that next) and so the army wants to ensure it is fully attended. To get that full attendance - apparently the over-invite. There are many ways to get out of Reserve Duty, if someone is so inclined. If you are traveling abroad, if some major event in your life is coming up, etc.
So the army calculated how many they expected not to attend, and balanced it with more invitations. Only motivation was high and more people confirmed they were coming than expected. At the last minute, the army called Elie to confirm he was coming; and called P. to tell him not to come.
So many, so motivated. Israel!