Let's see if I can recall the crazy round we just had when playing 2-player The Wastes of Eriador...
I don't remember the order that cards came out exactly, but we saw:
Card 1:Predatory Wolves (either discard your highest cost ally, or fetch and reveal a Warg, add to staging). We chose to both get a Warg, as the staging area was very tame at this point
Card 1a: White Warg (fetched and revealed via Predatory Wolves, damages when you engage him)
Card 1b: Northern Warg (fetched and revealed via Predatory Wolves, +1 threat to all wargs)
Card 2: Pressing Needs (fetch a side quest and reveal)
Card 2a: Make Camp (sidequest fetched and revealed via Pressing Needs, has Surge on it)
Card 2b: Weight of Responsibility (reveal another card for each quest card in play, 2 at this point)
Card 2c: Wolf of Angmar (surges)
Card 2d: another Weight of Responsibility (reveal 2 more cards)
Card 2e: Hunting Pack (gets an engagement cost discount)
Card 2f: Shrouded Hills (X threat, where X is number of quest cards in play)
Card 2g: Eriador Wastes (limit 5 progress placed on quest each round)
Card 2h: North Downs (+2 threat if it's Night, and it is, so this is 3 threat)
I think that's right... maybe a mistake somewhere. We went from 2 cards in the staging area to 14, with more than 20 threat in the staging area. The Northern Warg, who I thought would be pretty innocuous, ended up adding 5 threat. We were going to need to raise threat by 8, but 2 Elrond's Counsels plus 4 damage on Treebeard lowered that to 2. Still we handled this just fine (none of the cards are really that bad), but we lost the quest a round or two later when I hit 50 threat.
Just nuts! This level of surge potential is crazy.