Tom Cruise should really consider getting a stunt double, 'cause he screwed up another jump on the set of "Mission: Impossible 6" ... and might've injured himself again.
Filming resumed in London this week, and in this clip you see Cruise attempt to leap onto the ledge of a window ... but he slips on something before he gets out.
A cameraman on the scene says the actor was later seen using crutches, but there are no pics and we haven't confirmed.
It's strange -- Tom appeared to have nailed this exact scene last week, unclear why he did it again. As we reported ... he's fresh off a broken ankle from a failed jump on the set last year.
We've got a call in to Tom's camp for an injury update, but our advice -- let the stuntmen do their thing, Tom. It's all good ... we promise.