I mean, it makes more sense.
He's at work, soemthing gets broken, him and Jen work out it can't be fixed, she mentions TIME, he disappears for a few hours and comes back with it.
I reckon he's involved in illegal Jurassic artefact trading, rather than the completely unfeasible notion of using him time travelling clock (I'm OK with this bit) to go back to the Jurassic period (I'm OK with this bit) and somehow jet pack across the frozen tundra or sail down the rapids on the boat (this is the bit I think is implausible)
I worried it'll bring the Natural History Museum into disrepute.
And poor Jen is so in love with him she'd never tell