The heavy will wait for the boss giant on wave 5 of Metro to drop on their head and then use rage. Seen it probably about 5 times, but mostly recently.

I've never seen it happen, but it sounds like you've seen it a million times XD. I'm only a 35 tour heavy and I had to figure everything out myself, I never had a single thought to do something as stupid as push it the way it's walking. I do admit I make it fly back into safezone all the time, I find it hilarious.

It's happen to me too many times to count. Half of the time it is people from our group. It's not something that would cause us to lose, but it's quite annoying.

that would be bad heavies B)

I really dislike it. People will send a giant flying while i'm trying to shoot at it and of course I end up missing. Or in some cases just push the giant all the way to point A on Mannhattan.