It was difficult to have a conversation with him. He was either interrupting and rushing ahead or lagging and needing to be caught up. He was out of breath, and he perspired. A lot.
He wasn’t so much inventor as explorer. What he’d found was unmistakably not a time machine. It would be misleading to call it a boat or even a raft. It was more of a time flotation device.
With some metaphorical kicking he could maneuver around a bit, but the current was too strong to go anywhere it didn’t want you. The net result was a murky top-down view of present circumstances coupled with a startlingly clear perspective regarding the general course of things to come.
That which buoyed him made it difficult to submerge and engage without considerable effort. People just thought he was distracted, impatient, and in need of a good cardio-respiratory regimen.