It it wasn't for Sitwell, Bobbi could have survived that expression from Coulson without cracking. She slowly turned in tandem with her escort, eyebrows raised innocently and mouth set, only to echo Jasper's snort and have to raise a hand to put a rapid stop to it. The tactic didn't really work until she turned away from that face, peering out the window again, fingers still pressed to her lips to keep the laugh from escaping.
Giant monsters were not a major point of experience for her, but the moment Coulson relayed this information like he was a traffic reporter, Bobbi forgot about her snickering and said, "Awesome!", with both fists in the air. Then, "Is that where we're going?" They weren't exactly in a rush. Giant squids seemed like a rush sort of thing.