Well I just emailed Keith Wann and he said the "canned"
part of this joke didn't really come across in the joke,
even for him. So I asked what if...
You have about 12 plastic arms on sticks, with the sign either HAHA
or laughter and when something funny happens, you wave those
arms all around! He said that would be funny and the cultural
equivalent to canned laughter! But better yet, this litttle Hearie
person made Keith Wann laugh! I will walk on cloud nine for days~