I’m with @alison probably about 50 units although I’d need to read the manual to find where my magic calculator is – I assume there must be one & I’ve never been able to find it.
I’ve managed to stop the pump by laying on the buttons in my sleep & I came close to bolusing once, everything was dialed in but I hadn’t laid on the confirm button.
I guess I’m lucky in that if my blood sugar steeply changes when asleep I wake up.