Quick question about a relativity calculation. Scenario: conveyor belt going at 0.5c. At t= 0 Observer A is on the floor at x = 0 next to, but not on the conveyor belt. Observer A sees Observer B on the conveyor belt at t = 0 x = 0 smashing through a opaque sugar glass pane wearing body clock suit which is displaying the time as t'=0 and stamping observer B's forehead with that time. I'll refer to that as Event X. Observer B agrees with Observer A that its clock was saying t'=0, and that t'=0 has been stamped on its forehead at Event X. Observer C according to Observer A was at x = c on the conveyor belt at t = 0. With my calculations, Observer C would be stating that Event X happened at t' = -0.57735. Presumably this would mean that the B's clock would have been displaying t'=-0.57735 as it smashed through the opaque sugar glass, and presumably that would suggest -0.57735 had been stamped on the forehead. Which would seem to describe a different event. Have I understood this correctly?