Snoopy punches a cat.

Charlie Brown and his friends fall down a waterfall (they are not injured).

The bullies wreck Charlie Browns raft twice.

Sally threatens to punch a girls "lights out", but it never happens.

Bullies throw snowballs at Charlie Brown and his friends.

The bully's cat tries to attack snoopy and Woodstock several times.

Some mild language such as 'stupid'.

The bullies are very mean, also somewhat disturbing.

Would most likely be a PG rating in today's standards.