In their last years of service I was in a T3 on a Manchester-Heathrow Shuttle, in the rearmost of those rear-facing seat rows in the forward cabin. Directly opposite, forward-facing, was my right grumpy old client. Short sector, light weight, as we lifted off and climbed out the angle was such that, had it not been for my seatbelt, I would have landed squarely in the growling old so-and-so's lap. And by his facial expression he suddenly thought so too !
Definitely NOT a Gripper !