Ummm...
Since when was 4000 tons supposed to be a big feat for class 100s? Despite the description, class 100s don't simply mean guys who can lift/press 100 tons. Spiderman despite feats of lifting or bracing hundreds of tons is not a class 100 guy.
You have to understand how small 100 tons can be in relative terms. Single slabs of stone from Stonehenge alone weighs 50 or so tons.
Matching strength, however briefly, with WWH a guy who can manage quintillion or so tons, puts you way above lifting 4000 or so. That's like a small building.