Well, I suggested a horse, so motorcycle isn't the craziest thing ever. Noisy, yes. I think at one point Trackerd or someone else thought of golf cart or atv, and others have mentioned farm machinery. I guess it looks to me like too far of a leap from Jacob's print to the grassy area, but maybe my mind is filling in gaps between the photos I've seen. (I'm not 100% sure I've seen where print is in relation to side of driveway.) And if it's too far, then there's still the issue of no known tracks for any of those other means of transport.
When we starting talking tracks and foot prints, my eyes start to glaze over because it is so far over my head. But lately there has been talk on here that Jacobs last foot print looks as he "lifted himself". Was it close enough to the edge of the drive way where it is sometimes part grass and part gravel, the type of terrain where tracks probably would not show, that it would have been possible for a motorcycle to be parked there and Jacob was told to get on the back of a motorcycle?