Meaning of ボケに被せて小銭を落とす


I was reading something and I came across the following lines, however the
bolded part of the third line had me confused as to what they are saying.

>   * 清少納言、いわく
>   * 春って明け方やばくない？ と言っているのだが
>   * 本来、春の良さとは、 **入学してくる後輩がいきってボケたときそのボケに被せて小銭を落とす** のが良いと思っている
>   * ほどほどにしてやれよ
>   * しかもどうやって歌で詠むんだよ、それ
>

This seems to be a set up for the joke that comes up later where one of the
people listening to them makes a fool out of them and then they drop some
money on the floor:

>   * おい、まだボケてねぇよ
>   * お前は存在自体がボケだからな
>   * 存在するだけでチャリンチャリン落とすとか、正気かよ
>

Based on this and my understanding of the bolded line above, I think it does
mean to drop coins/change when they ボケ. However I am still a bit confused as
to well why one would do this (is it a reference to something I am missing?)




As far as I know, this is not a reference to some well-known episode. It's
just his own creative way of describing the "beauty" of spring. Spring is the
season when a new school year begins in Japan, and he somehow likes observing
clumsy new students.

