well believe it or not... i used to routinely hit these track close to my house at 85 plus and always grabbed air....never broke it either, however it was a 78 firebird and perhaps they built em stronger than....but nothing ever broke....except perhaps the girl i was dating at the times bladder...she once...well had an accident...if ya know what i mean....
but in all truth i don't think i ever came close to 5 feet...maybe 1+ tops.....mega fun it was though