Why it is not a good idea to rescue without explicit exception type?

rescue_exception.rb

# Why it is not a good idea to rescue without explicit exception type?
# Because:
#
#  begin
#   "..."
#  rescue
#  end
#
# Handles only StandardError descendants (no Excpetion descendants catched)

class SampleException < Exception; end
class SampleError < StandardError; end

begin
	raise SampleError.new("This is exception")
rescue Exception => e
	puts e.message # we have got here
end

begin
	raise SampleException.new("This is exception")
rescue Exception => e
	puts e.message # we have got here
end

begin
	raise SampleError.new("This is exception")
rescue => e
	puts e.message # we have got here
end

begin
	raise SampleException.new("This is exception")
rescue => e
	puts e.message # WE HAVEN'T GOT HERE !!!!!!!!!!
end

begin
	raise SampleException.new("This is exception")
rescue
	puts "we got here" # WE HAVEN'T GOT HERE NEITHER !!!!!!!!!!
end