it is, had thought of that, i got quite worried last year going to a conference, i was driving and the seats, i assume it was the seats, of the hire car had the same effect. i was quite convinced i was going to have a stroke and am such a bad passenger, when someone offered to drive i said ' nah, it'll most likely pass' lol i think they spent the rest of the trip hoping with their fingers crossed. it was a ford focus sporty thing. not that comfy. lol
Isn't the whole left arm going numb thing meant to be the sign of the onset of angina/heart attack could be the rucky but you never know