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The change in radius with time (dr/dt), or spread rates, are shown here to either level off at a constant non-zero rate or continue to accelerate well after the cigarette has fully extinguished, confirming once again that the smoldering spread is self-sustaining

(2) Stimulant Properties : Nicotine acts as a stimulant, leading to increased alertness and heightened cognitive functions

And, while we cant ask them, its likely that dogs hate cigarette smoke

Whilst vaping is legal in the UK, other countries will have different rules and regulations regarding their use and legality, so you should check the specific rules of the country you are travelling to well in advance