In the episode "747", when the Hulk is unleashed on a plane, an airsick passenger gets up and opens a door...only to see the Hulk on the other side, snarling. He closes the door, terrified, and checks again. Hulk is still there. So he shuts the door and the Hulk retreats back down below like nothing happened. The passenger goes back to his seat and says "you're not gonna believe me".
When Hulk is startled by Betty in the cave he hits his head on the low ceiling. Instead of freaking out and smashing the cave he rubs his head, grumbles and turns around looking embarrassed.
Even funnier, his pose when he walks out into the rain. He rubs his head, cocks a hip, and puts a hand on it.You can almost hear him thinking "Women" in an exasperated tone.
Later on in the same scene there's a lightning strike and thunder clap. Hulk throws a boulder at the sky, roars as loud as he can and gestures for Betty to stay in the cave, thinking that the thunder and lightning is a threat.
Once Bruce and Betty reach New York City looking for Mr. Blue, they contemplate the hazards of riding a subway full of typical New Yorkers and decide on taking a cab. Cuts to them sitting in the back of a cab driven by one extremely reckless Euro taxi driver whose antics nearly cause poor Bruce to hulk out from the stress.
Even better, it's Betty who goes into full meltdown, screaming at the taxi driver at the top of her lungs for nearly getting them killed. What sells it is the sound of Bruce's pulse watch bleeping down to safe level before:
After Blonsky knocks the Major out so that he can talk to (re: threaten) Sterns in private:
Blonsky: She's an annoying bitch.
Sterns: Why are you always hitting people?
Bruce messing up his classic line in Portuguese and frowning when he realizes it. "You wouldn't like it when I'm hungry. Wait, that doesn't sound right."
Before all the chaos starts, we get a peek of Bruce learning Portuguese by watching Sesame Street. It's seriously adorable.
Admit it. You laughed when the Hulk got pissed off and front kicked the ever loving shit out of Blonsky's arrogant ass.
The fact that Bruce couldn't make love to Betty isn't funny, but his exasperation upon discovering this fact is pretty amusing. The moment is then topped when she very sweetly consoles him after he tells her.
Bruce realizes to his horror that he isn't turning into the Hulk right after jumping out of a helicopter.