Do animals have adrenaline like humans? If we can lift cars why cant bears bend metal bars?
First, very few people would be able to lift a car, adrenalin or not. Adrenalin doesn’t make you stronger, it just increases your heartbeat and blood flow to the muscles, so you might be able to use them for longer but they won’t become stronger. Animals do have adrenalin, and I’m sure a bear might be able to bend at least some types of metal bars. If it would know how to bend things, that is. Smashing through them would take a lot more power than bending something (just look at the different strength it takes to bend a paper versus smashing through a paper). So even though a stressed bear with adrenalin running certainly would be more dangerous, it wouldn’t actually be stronger, nor able to smash trough metal bars.