Temporal Collision

What would happen if a teleport or a time traveller tried to occupy the same spatio-temporal coordinates as another material object? In the case of the time traveller, this question arises only if the means of time travel makes it possible, e.g., a spaceship orbiting around a Tipler machine is not in any danger of materializing inside another object.

Here are two very different speculative answers for time travellers:

"The peculiar risk lay in the possibility of finding some substance in the space which I, or the machine, occupied. So long as I travelled at a high velocity through time, this scarcely mattered: I was, so to speak, attenuated - was slipping like a vapour through the interstices of intervening substances! But to come to a stop involved the jamming of myself, molecule by molecule, into whatever lay in my way: meant bringing my atoms into such intimate contact with those of the obstacle that a profound chemical reaction - possibly a far-reaching explosion - would result, and blow myself and my apparatus out of all possible dimensions - into the Unknown."

-HG Wells, The Time Machine (London, 1973), 4, pp. 25-26.

The Time Patrol means of time travel is different:

"As near as I can follow it, put in twentieth-century words, you pass directly from one set of space-time coordinates to another. Maybe it's through a 'wormhole' - vague recollection of articles in Scientific American, Science News, Analog - and for a moment your dimensions equal zero; then as you expand into your destination volume, you displace whatever matter is there. Air molecules, obviously. Luis found that if a small solid object is in the way, it gets pushed aside. A big object, and the machine, with you aboard, settles beside it, off the exact spot you punched for. Probably mutual displacement. Action equals reaction. Agreed, Sir Isaac?

"There must be limits. Suppose he gets it badly wrong and we end up in the wall. Splintering studs, nails shoved through my guts, stucco and plaster like cannonball, and a ten- or twelve-foot drop to the ground on this heavy thing."

-"The Year of the Ransom," 22 May 1987, pp. 698-713 AT p. 703.

Castelar won't get it badly wrong because the timecycle will arrive either inside or outside the building but not in its wall. It is interesting to compare:

nineteenth and twentieth century imaginings of time travel, especially since we are now in the twenty first;

the Time Traveller's account of a profound chemical reaction with Wanda Tamberly's account of nails through her guts.